delivered the opinion of the Court.
Joan Stanley lived with Peter Stanley intermittently for 18 years, during which time they had three children.1 When Joan Stanley died, Peter Stanley lost not only her but also his children. Under Illinois law, the children of unwed fathers become wards of the State upon the death of the mother. Accordingly, upon Joan Stanley’s death, in a dependency proceeding instituted by the State of Illinois, Stanley’s children2 were declared wards of the State and placed with court-appointed guardians. Stanley appealed, claiming that he had never been shown to be an unfit parent and that since married fathers and unwed mothers could not be deprived of their children without such a showing, he had been deprived of the equal protection of the laws guaranteed him by the Fourteenth Amendment. The Illinois Supreme Court accepted the fact that Stanley’s own unfitness had not been established but rejected the equal protection claim, holding that Stanley could properly be separated from his children upon proof of the single fact that he and the dead mother *647had not been married. Stanley’s actual fitness as a father was irrelevant. In re Stanley, 45 Ill. 2d 132, 256 N. E. 2d 814 (1970).
Stanley presses his equal protection claim here. The State continues to respond that unwed fathers are presumed unfit to raise their children and that it is unnecessary to hold individualized hearings to determine whether particular fathers are in fact unfit parents before they are separated from their children. We granted certiorari, 400 U. S. 1020 (1971), to determine whether this method of procedure by presumption could be allowed to stand in light of the fact that Illinois allows married fathers — whether divorced, widowed, or separated — and mothers — even if unwed — the benefit of the presumption that they are fit to raise their children.
I
At the outset we reject any suggestion that we need not consider the propriety of the dependency proceeding that separated the Stanleys because Stanley might be able to regain custody of his children as a guardian or through adoption proceedings. The suggestion is that if Stanley has been treated differently from other parents, the difference is immaterial and not legally cognizable for the purposes of the Fourteenth Amendment. This Court has not, however, embraced the general proposition that a wrong may be done if it can be undone. Cf. Sniadach v. Family Finance Corp., 395 U. S. 337 (1969). Surely, in the case before us, if there is delay between the doing and the undoing petitioner suffers from the deprivation of his children, and the children suffer from uncertainty and dislocation.
It is clear, moreover, that Stanley does not have the means at hand promptly to erase the adverse consequences of the proceeding in the course of which his children were declared wards of the State. It is first *648urged that Stanley could act to adopt his children. But under Illinois law, Stanley is treated not as a parent but as a stranger to his children, and the dependency proceeding has gone forward on the presumption that he is unfit to exercise parental rights. Insofar as we are informed, Illinois law affords him no priority in adoption proceedings. It would be his burden to establish not only that he would be a suitable parent but also that he would be the most suitable of all who might want custody of the children. Neither can we ignore that in the proceedings from which this action developed, the “probation officer,” see App. 17, the assistant state’s attorney, see id., at 29-30, and the judge charged with the case, see id., at 16-18, 23, made it apparent that Stanley, unmarried and impecunious as he is, could not now expect to profit from adoption proceedings.3 The Illinois Supreme Court apparently recognized some or all of these considerations, because it did not suggest that Stanley’s case was undercut by his failure to petition for adoption.
Before us, the State focuses on Stanley’s failure to petition for “custody and control” — the second route by which, it is urged, he might regain authority for his children. Passing the obvious issue whether it would be futile or burdensome for an unmarried father — without funds and already once presumed unfit — to petition for custody, this suggestion overlooks the fact that legal custody is not parenthood or adoption. A person appointed guardian in an action for custody and control is subject to removal at any time without such *649cause as must be shown in a neglect proceeding against a parent. Ill. Rev. Stat., c. 37, § 705-8. He may not take the children out of the jurisdiction without the court’s approval. He may be required to report to the court as to his disposition of the children’s affairs. Ill. Rev. Stat., c. 37, § 705-8. Obviously then, even if Stanley were a mere step away from “custody and control,” to give an unwed father only “custody and control” would still be to leave him seriously prejudiced by reason of his status.
We must therefore examine the question that Illinois would have us avoid: Is a presumption that distinguishes and burdens all unwed fathers constitutionally repugnant? We conclude that, as a matter of due process of law, Stanley was entitled to a hearing on his fitness as a parent before his children were taken from him and that, by denying him a hearing and extending it to all other parents whose custody of their children is challenged, the State denied Stanley the equal protection of the laws guaranteed by the Fourteenth Amendment.
II
Illinois has two principal methods of removing non-delinquent children from the homes of their parents. In a dependency proceeding it may demonstrate that the children are wards of the State because they have no surviving parent or guardian. Ill. Rev. Stat., c. 37, §§ 702-1, 702-5. In a neglect proceeding it may show that children should be wards of the State because the present parent(s) or guardian does not provide suitable care. Ill. Rev. Stat., c. 37, §§ 702-1, 702-4.
The State’s right — indeed, duty — to protect minor children through a judicial determination of their interests in a neglect proceeding is not challenged here. Rather, we are faced with a dependency statute that empowers state officials to circumvent neglect proceedings *650on the theory that an unwed father is not a “parent” whose existing relationship with his children must be considered.4 “Parents,” says the State, “means the father and mother of a legitimate child, or the survivor of them, or the natural mother of an illegitimate child, and includes any adoptive parent,” Ill. Rev. Stat., c. 37, § 701-14, but the term does not include unwed fathers.
Under Illinois law, therefore, while the children of all parents can be taken from them in neglect proceedings, that is only after notice, hearing, and proof of such unfitness as a parent as amounts to neglect, an unwed father is uniquely subject to the more simplistic dependency proceeding. By use of this proceeding, the State, on showing that the father was not married to the mother, need not prove unfitness in fact, because it is presumed at law. Thus, the unwed father’s claim of parental qualification is avoided as “irrelevant.”
In considering this procedure under the Due Process Clause, we recognize, as we have in other cases, that due process of law does not require a hearing “in every conceivable case of government impairment of private interest.” Cafeteria Workers v. McElroy, 367 U. S. 886, 894 (1961). That case explained that “[t]he very nature of due process negates any concept of inflexible procedures universally applicable to every imaginable situation” and firmly established that “what procedures due process may require under any given set of circumstances must begin with a determination of the precise nature of the government function involved as well as of the private interest that has been affected by governmental *651action.” Id., at 895; Goldberg v. Kelly, 397 U. S. 254, 263 (1970).
The private interest here, that of a man in the children he has sired and raised, undeniably warrants deference and, absent a powerful countervailing interest, protection. It is plain that the interest of a parent in the companionship, care, custody, and management of his or her children “come[s] to this Court with a momentum for respect lacking when appeal is made to liberties which derive merely from shifting economic arrangements.” Kovacs v. Cooper, 336 U. S. 77, 95 (1949) (Frankfurter, J., concurring).
The Court has frequently emphasized the importance of the family. The rights to conceive and to raise one’s children have been deemed “essential,” Meyer v. Nebraska, 262 U. S. 390, 399 (1923), “basic civil rights of man,” Skinner v. Oklahoma, 316 U. S. 535, 541 (1942), and “[rjights far more precious ... than property rights,” May v. Anderson, 345 U. S. 528, 533 (1953). “It is cardinal with us that the custody, care and nurture of the child reside first in the parents, whose primary function and freedom include preparation for obligations the state can neither supply nor hinder.” Prince v. Massachusetts, 321 U. S. 158, 166 (1944). The integrity of the family unit has found protection in the Due Process Clause of the Fourteenth Amendment, Meyer v. Nebraska, supra, at 399, the Equal Protection Clause of the Fourteenth Amendment, Skinner v. Oklahoma, supra, at 541, and the Ninth Amendment, Griswold v. Connecticut, 381 U. S. 479, 496 (1965) (Goldberg, J., concurring).
Nor has the law refused to recognize those family relationships unlegitimized by a marriage ceremony. The Court has declared unconstitutional a state statute denying natural, but illegitimate, children a wrongful-death action for the death of their mother, emphasizing that *652such children cannot be denied the right of other children because familial bonds in such cases were often as warm, enduring, and important as those arising within a more formally organized family unit. Levy v. Louisiana, 391 U. S. 68, 71-72 (1968). “To say that the test of equal protection should be the ‘legal’ rather than the biological relationship is to avoid the issue. For the Equal Protection Clause necessarily limits the authority of a State to draw such ‘legal’ lines as it chooses.” Glona v. American Guarantee Co., 391 U. S. 73, 75-76 (1968).
These authorities make it clear that, at the least, Stanley’s interest in retaining custody of his children is cognizable and substantial.
For its part, the State has made its interest quite plain: Illinois has declared that the aim of the Juvenile Court Act is to protect “the moral, emotional, mental, and physical welfare of the minor and the best interests of the community” - and to “strengthen the minor’s family ties whenever possible, removing him from the custody of his parents only when his welfare or safety or the protection of the public cannot be adequately safeguarded without removal . . . .” Ill. Rev. Stat., c. 37, § 701-2. These are legitimate interests, well within the power of the State to implement. We do not question the assertion that neglectful parents may be separated from their children.
But we are here not asked to evaluate the legitimacy of the state ends, rather, to determine whether the means used to achieve these ends are constitutionally defensible. What is the state interest in separating children from fathers without a hearing designed to determine whether the father is unfit in a particular disputed case? We observe that the State registers no gain towards its declared goals when it separates children from the custody of fit parents. Indeed, if Stanley is a *653fit father, the State spites its own articulated goals when it needlessly separates him from his family.
In Bell v. Burson, 402 U. S. 535 (1971), we found a scheme repugnant to the Due Process Clause because it deprived a driver of his license without reference to the very factor (there fault in driving, here fitness as a parent) that the State itself deemed fundamental to its statutory scheme. Illinois would avoid the self-contradiction that rendered the Georgia license suspension system invalid by arguing that Stanley and all other unmarried fathers can reasonably be presumed to be unqualified to raise their children.5
*654It may be, as the State insists, that most unmarried fathers are unsuitable and neglectful parents.6 It may also be that Stanley is such a parent and that his children should be placed in other hands. But all unmarried fathers are not in this category; some are wholly suited to have custody of their children.7 This much the State *655readily concedes, and nothing in this record indicates that Stanley is or has been a neglectful father who has not cared for his children. Given the opportunity to make his case, Stanley may have been seen to be deserving of custody of his offspring. Had this been so, the State’s statutory policy would have been furthered by leaving custody in him.
Carrington v. Rash, 380 U. S. 89 (1965), dealt with a similar situation. There we recognized that Texas had a powerful interest in restricting its electorate to bona fide residents. It was not disputed that most servicemen stationed in Texas had no intention of remaining in the State; most therefore could be deprived of a vote in state affairs. But we refused to tolerate a blanket exclusion depriving all servicemen of the vote, when some servicemen clearly were bona fide residents and when “more precise tests,” id., at 95, were available to distinguish members of this latter group. “By forbidding a soldier ever to controvert the presumption of non-residence,” id., at 96, the State, we said, unjustifiably effected a substantial deprivation. It viewed people one-dimensionally (as servicemen) when a finer perception could readily have been achieved by assessing a serviceman’s claim to residency on an individualized basis.
“We recognize that special problems may be involved in determining whether servicemen have actually acquired a new domicile in a State for franchise purposes. We emphasize that Texas is free to take reasonable and adequate steps, as have other States, to see that all applicants for the vote actually fulfill the requirements of bona fide residence. But [the challenged] provision goes beyond such rules. *656‘[T]he presumption here created is . . . definitely conclusive — incapable of being overcome by proof of the most positive character.’ ” Id., at 96.
“All servicemen not residents of Texas before induction,” we concluded, “come within the provision’s sweep. Not one of them can ever vote in Texas, no matter” what their individual qualifications. Ibid. We found such a situation repugnant to the Equal Protection Clause.
Despite Bell and Carrington, it may be argued that unmarried fathers are so seldom fit that Illinois need not undergo the administrative inconvenience of inquiry in any case, including Stanley’s. The establishment of prompt efficacious procedures to achieve legitimate state ends is a proper state interest worthy of cognizance in constitutional adjudication. But the Constitution recognizes higher values than speed and efficiency.8 Indeed, one might fairly say of the Bill of Rights in general, and the Due Process Clause in particular, that they were designed to protect the fragile values of a vulnerable citizenry from the overbearing concern for efficiency and efficacy that may characterize praiseworthy government officials no less, and perhaps more, than mediocre ones.
Procedure by presumption is always cheaper and easier *657than individualized determination. But when, as here, the procedure forecloses the determinative issues of competence and care, when it explicitly disdains present realities in deference to past formalities, it needlessly risks running roughshod over the important interests of both parent and child. It therefore cannot stand.9
Bell v. Burson held that the State could not, while purporting to be concerned with fault in suspending a driver’s license, deprive a citizen of his license without a hearing that would assess fault. Absent fault, the State’s declared interest was so attenuated that administrative convenience was insufficient to excuse a hearing where evidence of fault could be considered. That drivers involved in accidents, as a statistical matter, might be very likely to have been wholly or partially at fault did not foreclose hearing and proof in specific cases before licenses were suspended.
We think the Due Process Clause mandates a similar result here. The State’s interest in caring for Stanley’s children is de minimis if Stanley is shown to be a fit *658father. It insists on presuming rather than proving Stanley’s unfitness solely because it is more convenient to presume than to prove. Under the Due Process Clause that advantage is insufficient to justify refusing a father a hearing when the issue at stake is the dismemberment of his family.
Ill
The State of Illinois assumes custody of the children of . married parents, divorced parents, and unmarried mothers only after a hearing and proof of neglect. The children of unmarried fathers, however, are declared dependent children without a hearing on parental fitness and without proof of neglect. Stanley’s claim in the state courts and here is that failure to afford him a hearing on his parental qualifications while extending it to other parents denied him equal protection of the laws. We have concluded that all Illinois parents are constitutionally entitled to a hearing on their fitness before their children are removed from their custody. It follows that denying such a hearing to Stanley and those like him while granting it to other Illinois parents is inescapably contrary to the Equal Protection Clause.10
*659The judgment of the Supreme Court of Illinois is reversed and the case is remanded to that court for proceedings not inconsistent with this opinion.
It is so ordered.
Mr. Justice Powell and Mr. Justice Rehnquist took no part in the consideration or decision of this case.
Mr. Justice Douglas joins in Parts I and II of this opinion.
TJncontradicted testimony of Peter Stanley, App. 22.
Only two children are involved in this litigation.
The Illinois Supreme Court’s opinion is not at all contrary to this conclusion. That court said: “[T]he trial court's comments clearly indicate the court’s willingness to consider a future request by the father for custody and guardianship.” 45 Ill. 2d 132, 135, 256 N. E. 2d 814, 816. (Italics added.) See also the comment of Stanley’s counsel on oral argument: “If Peter Stanley could have adopted his children, we would not be here today.” Tr. of Oral Arg. 7.
Even while refusing to label him a “legal parent,” the State does not deny that Stanley has a special interest in the outcome of these proceedings. It is undisputed that he is the father of these children, that he lived with the two children whose custody is challenged all their lives, and that he has supported them.
Illinois says in its brief, at 21-23.
“[T]he only relevant consideration in determining the propriety of governmental intervention in the raising of children is whether the best interests of the child are served by such intervention.
“In effect, Illinois has imposed a statutory presumption that the best interests of a particular group of children necessitates some governmental supervision in certain clearly defined situations. The group of children who are illegitimate are distinguishable from legitimate children not so much by their status at birth as by the factual differences in their upbringing. While a legitimate child usually is raised by both parents with the attendant familial relationships and a firm concept of home and identity, the illegitimate child normally knows only one parent — the mother. . . .
“. . . The petitioner has premised his argument upon particular factual circumstances — a lengthy relationship with the mother . . . a familial relationship with the two children, and a general assumption that this relationship approximates that in which the natural parents are married to each other.
“. . . Even if this characterization were accurate (the record is insufficient to support it) it would not affect the validity of the statutory definition of parent. . . . The petitioner does not deny that the children are illegitimate. The record reflects their natural mother’s death. Given these two factors, grounds exist for the State’s intervention to ensure adequate care and protection for these children. This is true whether or not this particular petitioner assimilates all or none *654of the normal characteristics common to the classification of fathers who are not married to the mothers of their children.”
See also Illinois’ Brief 23 (“The comparison of married and putative fathers involves exclusively factual differences. The most significant of these are the presence or absence of the father from the home on a day-to-day basis and the responsibility imposed upon the relationship”), id.., at 24 (to the same effect), id., at 31 (quoted below in n. 6), id., at 2A-26 (physiological and other studies are cited in support of the proposition that men are not naturally inclined to childrearing), and Tr. of Oral Arg. 31 (“We submit that both based on history or [sic] culture the very real differences . . . between the married father and the unmarried father, in terms of their interests in children and their legal responsibility for their children, that the statute here fulfills the compelling governmental objective of protecting children . . .”).
The State speaks of “the general disinterest of putative fathers in their illegitimate children” (Brief 8) and opines that “[i]n most instances, the natural father is a stranger to his children.” Brief 31.
See In re Mark T., 8 Mich. App. 122, 154 N. W. 2d 27 (1967). There a panel of the Michigan Court of Appeals in unanimously affirming a circuit court’s determination that the father of an illegitimate son was best suited to raise the boy, said:
“The appellants’ presentation in this case proceeds on the assumption that placing Mark for adoption is inherently preferable to rearing by his father, that uprooting him from the family which he knew from birth until he was a year and a half old, secretly institutionalizing him and later transferring him to strangers is so incontrovertibly better that no court has the power even to consider the matter. Hardly anyone would even suggest such a proposition if we were talking about a child born in wedlock.
“We are not aware of any sociological data justifying the assumption that an illegitimate child reared by his natural father is less likely to receive a proper upbringing than one reared by his natural father who was at one time married to his mother, or that the *655stigma of illegitimacy is so pervasive it requires adoption by strangers and permanent termination of a subsisting relationship with the child’s father.” Id., at 146, 154 N. W. 2d, at 39.
Cf. Reed v. Reed, 404 U. S. 71, 76 (1971). “Clearly the objective of reducing" the workload on probate courts by eliminating one class of contests is not without some legitimacy. . . . [But to] give a mandatory preference to members of either sex over members of the other, merely to accomplish the elimination of hearings on the merits, is to make the very kind of arbitrary legislative choice forbidden by the Equal Protection Clause of the Fourteenth Amendment.” Carrington v. Rash, 380 U. S. 89, 96 (1965), teaches the same lesson. “. . . States may not casually deprive a class of individuals of the vote because of some remote administrative benefit to the State. Oyama v. California, 332 U. S. 633. By forbidding a soldier ever to controvert the presumption of non-residence, the Texas Constitution imposes an invidious discrimination in violation of the Fourteenth Amendment.”
We note in passing that the incremental cost of offering unwed fathers an opportunity for individualized hearings on fitness appears to be minimal. If unwed fathers, in the main, do not care about the disposition of their children, they will not appear to demand hearings. If they do_care, under the scheme here held invalid, Illinois would admittedly at..somelatértnfié"have'tb aff6fd"fhem a properly_ focused hearing in a custody or adoption proceeding!
Extending opportunity for hearing Yb'unwed fathers who desire and claim competence to care for their children creates no constitutional or procedural obstacle to foreclosing those unwed fathers who are not so inclined. The Illinois law governing procedure in juvenile cases, Ill. Rev. Stat., c. 37, § 704r-l et seq., provides for personal service, notice by certified mail, or for notice by publication when personal or certified mail service cannot be had or when notice is directed to unknown respondents under the style of “All whom it may Concern.” Unwed fathers who do not promptly respond cannot complain if their children are declared wards of the State. Those who do respond retain the burden of proving their fatherhood.
Predicating a finding of constitutional invalidity under the Equal Protection Clause of the Fourteenth Amendment on the observation that a State has accorded bedrock procedural rights to some, but not to all similarly situated, is not contradictory to our holding in Picard v. Connor, 404 U. S. 270 (1971). In that case a due process, rather than an equal protection, claim was raised in the state courts. The federal courts were, in our opinion, barred from reversing the state conviction on grounds of contravention of the Equal Protection Clause when that clause had not been referred to for consideration by the state authorities. Here, in contrast, we dispose of the case on the constitutional premise raised below, reaching the result by a method of analysis readily available to the state court.
For the same reason the strictures of Cardinale v. Louisiana, 394 U. S. 437 (1969), and Hill v. California, 401 U. S. 797 (1971), have been fully observed.