A fit parent gets divorced. The marriage ends. The parent's love
for the child does not, and neither does the parent's capacity to
care for that child. Then a courtroom hands the parent a calendar
that allocates time with their own child in fractions — every
other weekend, half of Wednesday, alternating holidays.
The state's answer, written into divorce-custody statutes, treats
the dissolution of a marriage as the trigger for a new legal
regime, one that by default reduces the child's access to one
capable parent without any finding that the parent is unfit. The
Constitution's answer is different.
The Constitution says fitness, not
marriage, determines parental rights.
Nineteen Supreme Court cases make the point. They span a century.
What the Constitution actually says about parental rights
Parents have a fundamental liberty interest in the care, custody,
and control of their children. The Fourteenth Amendment protects
it under strict scrutiny. The Supreme Court has affirmed this in
decisions stretching from Meyer v. Nebraska (1923) through
Troxel v. Granville (2000).
The clearest modern statement comes from Troxel, where the Court
reviewed a Washington statute that let a court override a fit
parent's visitation decision based on a judge's view that the
override would serve the child's best interest. The plurality
opinion struck the statute down:
It cannot now be doubted that the Due Process Clause of the
Fourteenth Amendment protects the fundamental right of parents
to make decisions concerning the care, custody, and control of
their children.
This right is old. In 1923, Meyer v. Nebraska had already
rooted it in the Fourteenth Amendment's guarantee of liberty:
liberty "denotes not merely freedom from bodily restraint but also
the right of the individual … to marry, establish a home and bring
up children." The right belongs to the parent. It is not
derivative of the family unit, and it is not derivative of
marriage.
When a state burdens a fundamental right, courts apply strict
scrutiny: the state must show a compelling interest and use the
narrowest available means to achieve it. Bare statutory preference
does not satisfy strict scrutiny. Neither does a judge's view that
some alternative arrangement would serve a child better.
Parental rights don't depend on marriage
Constitutional rights belong to individuals, not to marriages.
The Supreme Court has stated this plainly across half a century of
cases. Marriage is not a prerequisite for parental rights, and
the dissolution of a marriage does not extinguish them.
The point traces back to Stanley v. Illinois (1972). Illinois
had a statute that presumed an unmarried father unfit and removed
his children to state custody on the mother's death, without any
hearing on his actual fitness. The Court held the statute
unconstitutional. Stanley's interest in his children, the Court
wrote, was "the interest of a parent in the companionship, care,
custody, and management of his or her children" — an interest
that "comes to this court with a momentum for respect lacking when
appeal is made to liberties which derive merely from shifting
economic arrangements." Stanley was unmarried. The Court treated
his parental interest the same as it would have treated any fit
parent's.
That same year, Eisenstadt v. Baird generalized the point for
all fundamental personal rights:
If the right of privacy means anything, it is the right of the
individual, married or single, to be free from unwarranted
governmental intrusion …
Twenty years later, the joint opinion in Planned Parenthood v.
Casey (1992) restated the principle in family-decision terms:
"The Constitution protects all individuals, male or female,
married or unmarried, from the abuse of governmental power, even
where that power is employed for the supposed benefit of a member
of the individual's family."
Lehr v. Robertson (1983) extended the principle to parental
rights specifically. The Court held that even a biological parent
who was never married to the child's other parent can acquire a
constitutionally protected liberty interest in the parent-child
relationship once that parent has come forward to participate in
the child's rearing.
These cases share a single conclusion. The fundamental right to
parent is individual. It is not derivative of marriage, and it
does not depend on the legal status of the relationship between
the child's two parents.
Why classifying parents by marital status fails Equal Protection
Between 1968 and 1988, the Supreme Court systematically struck
down state laws that treated children or parents differently based
on parental marital status. The cases were not about divorce. They
were about what state legislatures had once called "illegitimacy"
— children born to unmarried parents. The same Equal Protection
logic applies to divorce-custody statutes that classify two fit
parents asymmetrically based solely on the dissolution of a
marriage.
The line opens with Levy v. Louisiana (1968), which struck down
a wrongful-death statute denying recovery to children whose
parents had not married. Weber v. Aetna Casualty & Surety Co.
(1972) supplied the most directly applicable language:
Imposing disabilities on the illegitimate child is contrary to
the basic concept of our system that legal burdens should bear
some relationship to individual responsibility or wrongdoing.
Obviously, no child is responsible for his birth.
The same is true of children whose parents divorce. No child is
responsible for the dissolution.
Gomez v. Perez (1973) closed the rhetorical arc:
Once a State posits a judicially enforceable right on behalf of
children to needed support from their natural fathers there is
no constitutionally sufficient justification for denying such an
essential right to a child simply because its natural father has
not married its mother. For a State to do so is "illogical and
unjust."
The Court reinforced this line repeatedly. Trimble v. Gordon
(1977) held that a state may not punish children for the conduct
of their parents. Mathews v. Lucas (1976) established that
classifications based on parental marital status receive
intermediate scrutiny: they must be substantially related to a
legitimate state interest.
New Jersey Welfare Rights Organization v. Cahill (1973) held
that benefits indispensable to children's well-being cannot be
denied on marital-status grounds. Jimenez v. Weinberger (1974)
refused to permit two subclasses of similarly situated children
to be treated unequally based on the marital status of their
parents. Lalli v. Lalli (1978) required that even legitimate
state interests be pursued through carefully tailored means.
Parham v. Hughes (1979) named the controlling interests at
stake as "the integrity of the family against state interference
and the freedom of a [parent] to raise [their] own children."
Pickett v. Brown (1983) held that administrative convenience
could not be "an impenetrable barrier that works to shield
otherwise invidious discrimination." City of Cleburne v. Cleburne
Living Center (1985) confirmed that even rational-basis review
fails when a classification's relationship to its asserted goal is
"so attenuated as to render the distinction arbitrary or
irrational." And Clark v. Jeter (1988) closed the line:
classifications affecting fundamental rights receive "the most
exacting scrutiny."
The structural identity
Stripped to its structure, the parallel is direct.
- Then. The state denied children rights because their parents
were never married. The Supreme Court held: Equal Protection
violation. The classification turned on a marital status the
child could not control and that bore no relation to fitness or
to merit. - Now. The state strips a fit parent's equal time with their
child because the parents' marriage dissolved. Same analysis.
The classification turns on a marital status, now dissolved
rather than never formed, and stands alone, without any finding
of unfitness in the parent who loses the time.
The cases form a single line. The principle is that marital status
of the parents is not, by itself, a constitutionally sufficient
ground for asymmetric state treatment of the children or the
parents.
What this means for divorce custody today
Under existing Supreme Court precedent, a state cannot strip a fit
parent of the rights to direct the care, custody, and control of
their child based solely on the dissolution of a marriage. Yet
most state divorce-custody statutes permit exactly that outcome.
They use "best interests of the child" as the standard, with
broad judicial discretion to allocate parental time and
decision-making, and no required finding of unfitness before that
allocation becomes asymmetric.
The critique is careful. "Best interests of the child" remains a
constitutionally permissible standard when one parent has been
adjudicated unfit, or when the dispute is between a parent and a
non-parent (the actual facts of Troxel). The argument here is
as-applied: the standard fails strict scrutiny when invoked
to override the fundamental rights of two fit parents based on
nothing more than divorce. A judge's substituted judgment about
which fit parent would serve a child better cannot displace a
constitutionally protected fundamental right absent a finding of
unfitness or other specific harm.
The constitutional defect lives in the statutory framework most
states inherited from pre-Fourteenth-Amendment common law. Family
courts work within the statutes they are required to apply.
What the constitutional argument is NOT
This argument has clear limits. It does not eliminate the safety
exception. It does not mandate 50/50 custody. It applies to state
action, not private agreement. And it is not a critique of courts
as institutions.
Safety exception preserved. Where abuse, neglect, coercive
control, or serious parental unfitness has been substantiated,
asymmetric allocation of parental time and decision-making is
both constitutional and necessary to protect the child. Every
shared-parenting state statute enacted in the past two decades
preserves this carve-out. Kentucky's KRS 403.270(2), for example,
makes its rebuttable presumption of joint custody and equally
shared parenting time "Subject to KRS 403.315" — the state's
domestic-violence safeguard — and requires courts to weigh as a
relevant factor "a finding by the court that domestic violence
and abuse … has been committed by one (1) of the parties against
a child of the parties or against another party." Where such a
finding is made, the statute further directs courts to disregard
the parent's willingness to support contact with the other parent
if that contact "will endanger the health or safety of either
that party or the child."
No 50/50 mandate. The Constitution forbids the structural
defect. It does not prescribe any specific schedule. A rebuttable
presumption of substantially equal parenting time is one
straightforward remedy — seven states have adopted it — but the
Constitution does not require it. Geography, work schedules, and
child preference can all justify deviation. What the Constitution
forbids is the presumption of asymmetric allocation based on
divorce alone.
Applies to state action. Two fit parents who privately agree
to an asymmetric parenting schedule raise no constitutional
issue. The Fourteenth Amendment binds the state, acting through
its courts and statutes. It does not bind parents who reach their
own arrangements.
Not anti-court. Family courts will continue to decide
contested custody, just as they decide every other family-law
dispute. The constitutional critique falls on the statutes courts
are required to apply, and on the as-applied doctrine that
conflates divorce between two fit parents with unfitness. It does
not fall on the courts themselves, the judges who staff them, or
the attorneys who practice before them.
Where the reform meets the Constitution
Seven states have already enacted what the Constitution requires:
a rebuttable presumption that two fit parents receive
substantially equal parenting time, with explicit safety
exceptions for substantiated abuse, neglect, coercive control,
and serious unfitness. The states are Kentucky, Arkansas, Florida,
the District of Columbia, Missouri, West Virginia, and Wyoming.
Mississippi joins them on July 1, 2026, under HB 1662. Several
more states have joint-custody presumptions or parenting-time
policies that move in the same direction without crossing the
equal-time threshold. Roughly ten states have pending
shared-parenting legislation.
The reform tracks the doctrine. The bills do not ask the
Constitution to change. They ask the statutes to catch up to what
the Constitution already requires.
For the current state-by-state landscape, see
equal parenting by state. For the
empirical case, what shared parenting actually means for child
outcomes, see
what equal co-parenting actually means.
Closing
The Constitution says fitness, not marriage, determines parental
rights. Nineteen Supreme Court cases, three doctrinal lines, and
a century of decisions all point in the same direction. Parents
who recognize their own situation in this argument can look to
the state tracker for the legal landscape. Lawmakers and
journalists working on shared-parenting reform will find the
citations in the Table of Authorities below.
This article is for general educational and advocacy purposes,
not legal advice. Parents facing custody decisions should consult
an attorney licensed in their state. Both Parents Editorial is
not affiliated with any law firm.
Frequently asked questions
Do parents have constitutional rights?
Yes. The Supreme Court has held repeatedly that parents have a
fundamental right to direct the care, custody, and control of
their children, anchored in the Fourteenth Amendment's Due
Process and Equal Protection Clauses. The leading modern case is
Troxel v. Granville (2000).
Does marriage determine parental rights?
No. The Supreme Court has held since at least Eisenstadt v.
Baird (1972) that constitutional rights belong to individuals,
not to marriages. The fundamental right to parent attaches to
fit parents — married, divorced, or never married.
What is the fundamental right to parent?
The constitutional right of a fit parent to make decisions about
the care, custody, education, and upbringing of their child. The
Supreme Court has called it "perhaps the oldest of the
fundamental liberty interests" (Troxel, 2000) and applies
strict scrutiny when states burden it.
Can a state strip a fit parent's rights in a divorce?
Under existing Supreme Court precedent, no — not without a
finding of unfitness, and not based solely on the dissolution of
a marriage. Yet most state divorce custody statutes allocate
parental time asymmetrically between two fit parents without any
such finding.
What does Troxel v. Granville say?
Troxel (2000) held that a Washington statute violated the
Fourteenth Amendment by allowing a court to override a fit
parent's decision based on the judge's view of the child's best
interests. The plurality wrote that "the interest of parents in
the care, custody, and control of their children is perhaps the
oldest of the fundamental liberty interests."
Does the Constitution require equal parenting time?
The Constitution does not mandate a specific custody schedule.
What it forbids is state action that classifies two fit parents
asymmetrically based solely on the dissolution of a marriage,
without a finding of unfitness. A rebuttable presumption of
substantially equal parenting time is one way, perhaps the
simplest, to comply with that requirement.
What about cases involving abuse or neglect?
The constitutional argument does not eliminate the safety
exception. Substantiated abuse, neglect, coercive control, and
serious parental unfitness remain grounds for asymmetric
custody. The argument applies when both parents are fit, willing,
and able. Every shared-parenting state statute preserves this
carve-out.
How is this different from bastardy laws the Supreme Court struck down?
The Supreme Court struck down dozens of state laws between 1968
and 1988 that treated children or parents differently based on
whether the parents were married — Levy v. Louisiana (1968)
through Clark v. Jeter (1988). The argument here is that
classifying parents by marital status — including by dissolved
marital status — fails the same Equal Protection analysis.
Table of Authorities
Line 1 — Parental rights are fundamental individual rights
- Troxel v. Granville, 530 U.S. 57 (2000) — Fit parents are
presumed to act in their children's best interests; a state
may not override that presumption on a judge's substituted
judgment.
Justia - Stanley v. Illinois, 405 U.S. 645 (1972) — Parental rights
are individual and do not depend on marital status; a state
may not presume an unmarried parent unfit without a hearing.
Justia - Lehr v. Robertson, 463 U.S. 248 (1983) — A biological
parent who has developed a substantial relationship with the
child has a constitutionally protected liberty interest in
that relationship.
Justia - Meyer v. Nebraska, 262 U.S. 390 (1923) — Liberty under
the Fourteenth Amendment includes the right to direct the
upbringing and education of one's children.
Justia
Line 2 — Parental rights do not depend on marriage
- Eisenstadt v. Baird, 405 U.S. 438 (1972) — Constitutional
rights inhere in the individual and do not vary by marital
status.
Justia - Planned Parenthood of Southeastern Pa. v. Casey, 505 U.S.
833 (1992) — Liberty protects individuals against
governmental interference with fundamentally personal
decisions, regardless of family or marital relationships.
Justia - Griswold v. Connecticut, 381 U.S. 479 (1965) — Where
fundamental personal liberties are at stake, the state must
show a compelling interest and a narrowly tailored means.
Justia
Line 3 — Equal Protection forbids classifying by parental marital status
- Levy v. Louisiana, 391 U.S. 68 (1968) — A state may not
deny children rights based solely on whether their parents
were married.
Justia - Weber v. Aetna Casualty & Surety Co., 406 U.S. 164 (1972)
— Penalizing children for their parents' marital status
violates Equal Protection.
Justia - Gomez v. Perez, 409 U.S. 535 (1973) — A state cannot
deny an essential right to a child because the parents were
unmarried.
Justia - New Jersey Welfare Rights Organization v. Cahill, 411
U.S. 619 (1973) — Benefits indispensable to children's
well-being cannot be denied based on parental marital status.
Justia - Jimenez v. Weinberger, 417 U.S. 628 (1974) — Two
subclasses of similarly situated children may not be treated
unequally based on parental marital status.
Justia - Mathews v. Lucas, 427 U.S. 495 (1976) — Classifications
based on parental marital status receive intermediate
scrutiny; must be substantially related to a legitimate
state interest.
Justia - Trimble v. Gordon, 430 U.S. 762 (1977) — A state may not
punish children for the conduct of their parents.
Justia - Lalli v. Lalli, 439 U.S. 259 (1978) — Even legitimate
state interests must be pursued through carefully tailored
means.
Justia - Parham v. Hughes, 441 U.S. 347 (1979) — Family integrity
and parental freedom to raise children are controlling
Fourteenth Amendment interests.
Justia - Pickett v. Brown, 462 U.S. 1 (1983) — Heightened
scrutiny applies to marital-status classifications;
administrative convenience cannot shield invidious
discrimination.
Justia - City of Cleburne v. Cleburne Living Center, 473 U.S. 432
(1985) — A classification fails Equal Protection when its
relationship to the asserted state interest is so attenuated
as to be arbitrary.
Justia - Clark v. Jeter, 486 U.S. 456 (1988) — Classifications
affecting fundamental rights receive "the most exacting
scrutiny."
Justia