Shapiro v. Thompson: Right to Travel and Equal Protection

Decided on April 21, 1969, Shapiro v. Thompson was a 6–3 Supreme Court ruling that struck down one-year residency requirements for welfare benefits in Connecticut, Pennsylvania, and the District of Columbia. Justice William J. Brennan Jr., writing for the majority, held that forcing new arrivals to wait a year before receiving Aid to Families with Dependent Children (AFDC) penalized the constitutional right to travel between states and violated the Equal Protection Clause of the Fourteenth Amendment. The decision established that laws burdening interstate migration must survive strict scrutiny, and it remains the foundation of modern right-to-travel doctrine.¹

The Families Behind the Case

The Court consolidated three separate challenges. The lead plaintiff, Vivian Marie Thompson, had moved from Boston to Hartford to live closer to her mother. She arrived without a job and without savings to support herself and her child during the search. She had been receiving welfare in Massachusetts, but when she applied for AFDC in Connecticut the state denied her solely because she had not lived there for a full year.² Applicants in the District of Columbia and Pennsylvania had been turned away under identical rules.¹

Every applicant met every other eligibility criterion. They lived in the jurisdiction where they applied. They had dependent children. They lacked income. The single disqualifying fact was recent arrival. Families already in crisis were cut off from food and housing assistance for up to twelve months because they had relocated.

The Right to Interstate Travel

The majority’s central holding was that the waiting period penalized the constitutional right to move freely between states. The Court declined to anchor that right to any single clause, saying it had “no occasion to ascribe the source of this right to travel interstate to a particular constitutional provision.”¹ The right was treated as inherent in a federal union whose citizens are free to cross state lines for any reason.

The reasoning was practical. A family that must choose between relocating for work or family and losing the benefits that keep them fed is not exercising a free choice. If a state can deny basic subsistence to anyone who recently arrived, the right to travel becomes meaningless for people who are poor. The waiting period operated as a financial penalty for moving, and any classification penalizing the exercise of a fundamental right triggers heightened constitutional scrutiny.¹

Strict Scrutiny Under the Equal Protection Clause

The constitutional route depended on the jurisdiction. Connecticut and Pennsylvania were analyzed under the Equal Protection Clause of the Fourteenth Amendment. The District of Columbia was analyzed under the Due Process Clause of the Fifth Amendment, which imposes an equivalent constraint on the federal government. Both routes produced the same conclusion: the one-year rule created an unconstitutional two-tier system of needy residents.¹

Most government classifications need only a rational relationship to a legitimate purpose.³ When a law burdens a fundamental right, courts instead apply strict scrutiny: the government must show that the classification is necessary to achieve a compelling interest and is narrowly tailored to it. The residency requirements failed. The Court held that the interests behind the classification “either may not constitutionally be promoted by government or are not compelling governmental interests.”¹

Why the States’ Justifications Failed

The states offered four reasons for the waiting period. The Court rejected each one.

Deterring in-migration of the poor. A state cannot pursue the goal of keeping needy people out. That objective is constitutionally illegitimate on its face and cannot justify any classification, let alone one that burdens a fundamental right.
Protecting the state budget. Fiscal savings can be a legitimate concern in the abstract, but a state may not protect its treasury by fencing out the people who need help most. Saving money by denying benefits to a disfavored group is not a compelling interest.
Rewarding past tax contributions. The Court held that the Equal Protection Clause forbids states from distributing benefits based on how much a resident has paid in past taxes.
Administrative convenience and fraud prevention. The Court found that states did not actually use the one-year rule for these purposes and had no need to, since less restrictive verification methods were available.¹

The Dissents

Chief Justice Earl Warren, joined by Justice Hugo Black, argued that Congress had authorized the waiting periods through Section 402(b) of the Social Security Act and that the burden on travel was minimal. The majority answered that even if Congress had approved the rule, Congress cannot authorize states to violate the Equal Protection Clause. The unconstitutional act was the state legislation itself, not any federal statute permitting it.¹

Justice John Marshall Harlan II wrote separately. He would have applied the traditional rational basis test and criticized the majority’s use of strict scrutiny for non-racial classifications as an unwise expansion of equal protection law. In his view, the state interests were legitimate and the effect on travel was indirect.

How Shapiro Shaped the Law That Followed

The principle that durational residency requirements burdening travel must survive strict scrutiny quickly reached beyond welfare.

Voting

In Dunn v. Blumstein (1972), the Court struck down Tennessee’s requirement that voters live in the state for a year and in the county for three months before registering. Citing Shapiro directly, the Court held that any classification penalizing the exercise of the right to travel triggers strict scrutiny, and that it does not matter whether the waiting period actually deters travel in practice.⁴

Medical Care

Two years later, in Memorial Hospital v. Maricopa County (1974), the Court struck down Arizona’s one-year residency rule for indigent non-emergency medical care at county expense. Medical care, the Court reasoned, is as much a basic necessity of life for a poor person as welfare, so the state had to show a compelling interest, and could not.⁵

Welfare Benefits Revisited

In Saenz v. Roe (1999), California tried a softer version of the same idea: new residents received only the benefit amount they would have received in their previous state for their first year in California. The Court struck it down under the Privileges or Immunities Clause of the Fourteenth Amendment, holding that new residents are entitled to the same benefits as long-standing ones. As in Shapiro, federal legislation authorizing the state scheme, here the Personal Responsibility and Work Opportunity Reconciliation Act of 1996, could not save it.⁶

Where Residency Requirements Still Survive

Shapiro did not eliminate every durational residency rule. In Sosna v. Iowa (1975), the Court upheld Iowa’s one-year residency requirement for filing for divorce. The distinction was that the waiting period only delayed access to the courts; it did not permanently deny anything. The state also had a genuine interest in confirming a real connection to the forum and in insulating its divorce decrees from later challenge in other jurisdictions.⁷ In-state college tuition rules, typically requiring six to twelve months of residency, have likewise survived legal challenges as reasonable tools for distinguishing genuine residents from students who relocate temporarily for school.

The line drawn in 1969 remains the controlling one. When a residency requirement denies a basic necessity of life and penalizes the exercise of the right to relocate, it must satisfy strict scrutiny. When it imposes only a delay on a non-essential benefit or serves a purpose closely tied to genuine residency, courts give the government significantly more room.

1
Justia U.S. Supreme Court Center. Shapiro v. Thompson, 394 U.S. 618 (1969)
2
Oyez. Shapiro v. Thompson
3
Legal Information Institute. Rational Basis Test
4
Justia U.S. Supreme Court Center. Dunn v. Blumstein, 405 U.S. 330 (1972)
5
Supreme Court of the United States. Memorial Hospital v. Maricopa County, 415 U.S. 250 (1974)
6
Justia U.S. Supreme Court Center. Saenz v. Roe, 526 U.S. 489 (1999)
7
Justia. Sosna v. Iowa, 419 U.S. 393 (1975)