---
title: "United States v. Windsor | Civil Rights"
description: "United States v. Windsor is the 2013 Supreme Court case that struck down DOMA's federal marriage definition, shaping LGBTQ+ rights and equal protection."
canonical: "https://fiveable.me/civil-rights-civil-liberties/key-terms/united-states-v-windsor"
type: "key-term"
subject: "Civil Rights and Civil Liberties"
unit: "Unit 3"
---

# United States v. Windsor | Civil Rights

## Definition

United States v. Windsor is the 2013 Supreme Court case that struck down Section 3 of DOMA, so the federal government had to recognize legal same-sex marriages for benefits and taxes in Civil Rights and Civil Liberties.

## What It Is

United States v. Windsor is a 2013 Supreme Court case in Civil Rights and Civil Liberties that invalidated Section 3 of the Defense of Marriage Act (DOMA). That section said, for federal purposes, marriage meant only a union between one man and one woman, even if a state already recognized a same-sex marriage.

The case came from Edith Windsor, who was forced to pay a large federal estate tax bill after her wife died because the federal government did not treat their marriage as valid. That detail matters because it shows how civil rights cases are not just abstract arguments about labels. They can affect taxes, inheritance, immigration, Social Security, and other everyday legal benefits.

The Court ruled that the federal government could not single out legally married same-sex couples in that way. The opinion focused on the unequal treatment created by DOMA and recognized that the law imposed a stigma on same-sex couples whose marriages were valid under state law. In class, this is often discussed through equal protection reasoning and the broader idea that government cannot treat one group as inferior without a strong constitutional justification.

Windsor is also part of the story of substantive due process and marriage rights. It did not by itself create a nationwide right to same-sex marriage, but it pushed constitutional law closer to that result by treating marriage as a protected liberty interest and by weakening the federal defense of excluding same-sex couples from legal recognition.

The case matters because it sits right between earlier anti-discrimination battles and the later marriage equality decision in Obergefell v. Hodges. If you are tracing the LGBTQ+ rights movement in a timeline, Windsor is the point where the federal government’s definition of marriage started to break down in court. That made it a major turning point, not just another isolated Supreme Court case.

## Why It Matters

United States v. Windsor shows how constitutional principles become real in everyday life. In Civil Rights and Civil Liberties, this case is a strong example of how equal protection arguments can challenge laws that look neutral at first glance but actually create unequal legal treatment.

It also helps you connect separate course topics. When you study discrimination based on sexual orientation and gender identity, Windsor is a concrete case that shows the legal system moving away from exclusion. When you study the LGBTQ+ rights movement, it marks a major win that followed years of activism, litigation, and public pressure.

This case is also useful for understanding how the Supreme Court builds change gradually. Windsor did not finish the marriage equality story, but it changed the legal landscape so that later cases, especially Obergefell v. Hodges, had a stronger foundation. That makes Windsor a good example of precedent shaping future rights claims.

If your class uses case analysis, Windsor is the kind of case where you should identify the law being challenged, the constitutional argument, and the real-world harm. That helps you move from memorizing a case name to explaining what it actually did.

## Connections

### Defense of Marriage Act (DOMA)

Windsor directly challenged DOMA, especially the section that defined marriage for federal law as only between one man and one woman. If you know DOMA, you can see exactly what the Court struck down and why federal benefits, taxes, and recognition were affected.

### Equal Protection Clause

The case is often taught through equal protection because DOMA treated legally married same-sex couples differently from other married couples. That unequal treatment is the constitutional problem the Court focused on when it rejected the law.

### Obergefell v. Hodges

Windsor came before Obergefell and helped set the stage for nationwide marriage equality. Windsor dealt with federal recognition of same-sex marriages, while Obergefell went further and required states to license and recognize those marriages.

### [Edith Windsor](/civil-rights-civil-liberties/key-terms/edith-windsor)

Edith Windsor is not just a side detail, she is the person whose tax bill made the case possible. Her situation shows how a constitutional issue can grow out of a real legal penalty, like losing a spousal estate tax exemption.

## On the AP Exam

A short-answer or essay question may ask you to identify Windsor as a case that struck down DOMA and expanded federal recognition of same-sex marriage. When you see a prompt about LGBTQ+ rights, equal protection, or marriage benefits, use this case to show how discrimination worked through tax law, inheritance, and federal benefits, not just social stigma.

If a passage or question mentions a legally married same-sex couple being denied spousal benefits, Windsor is the case you should connect to that scenario. A strong response usually names the law, the constitutional issue, and the result: the federal government could not refuse recognition to marriages that were already valid under state law.

## United States v. Windsor vs Obergefell v. Hodges

United States v. Windsor struck down the federal definition of marriage in DOMA, which meant the federal government had to recognize some same-sex marriages. Obergefell v. Hodges went further by requiring states to allow and recognize same-sex marriage nationwide.

## Key Takeaways

- United States v. Windsor is the 2013 Supreme Court case that struck down part of DOMA and changed federal treatment of same-sex marriages.
- The case is tied to Edith Windsor’s estate tax dispute, which shows how discrimination can show up in real financial harms.
- Windsor is a major LGBTQ+ rights case because it weakened the federal government's ability to treat same-sex married couples as second-class.
- The decision is often connected to equal protection and substantive due process in Civil Rights and Civil Liberties.
- It helped set up the legal path toward Obergefell v. Hodges and nationwide marriage equality.

## FAQs

### What is United States v. Windsor in Civil Rights and Civil Liberties?

It is the 2013 Supreme Court case that struck down Section 3 of DOMA, the part that denied federal recognition to same-sex marriages. The decision meant married same-sex couples could access federal benefits and legal protections that had been withheld from them.

### How is United States v. Windsor different from Obergefell v. Hodges?

Windsor dealt with federal recognition of same-sex marriages, while Obergefell required states to license and recognize same-sex marriages nationwide. Windsor was a major step, but it did not by itself make same-sex marriage legal in every state.

### Why was Edith Windsor important in the case?

Edith Windsor challenged DOMA after being denied a federal estate tax exemption following her wife’s death. Her case showed how a discriminatory law created a direct financial penalty for a legally married same-sex couple.

### Is United States v. Windsor an equal protection case or a due process case?

It is often discussed with equal protection because the law treated same-sex couples differently from other married couples. It is also connected to substantive due process because it fits the broader constitutional story about marriage and personal liberty.

## Related Study Guides

- [3.3 Sexual orientation and gender identity discrimination](/civil-rights-civil-liberties/unit-3/sexual-orientation-gender-identity-discrimination/study-guide/0vj9dBN3nVKkw7Xu)
- [4.2 Substantive due process](/civil-rights-civil-liberties/unit-4/substantive-due-process/study-guide/VzeRczovY3fSol4k)
- [7.3 LGBTQ+ rights movement](/civil-rights-civil-liberties/unit-7/lgbtq-rights-movement/study-guide/ZhzUd2mllWsVL1RB)

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