
The U.S. Constitution has been used to address sex discrimination issues and promote equal treatment under the law. The Fourteenth Amendment's Equal Protection Clause has been used to prevent states from excluding same-sex couples from civil marriage and to advance women's rights. However, the ERA has not been officially added to the Constitution, and the Trump administration's executive orders have promoted sex discrimination, impacting transgender people in federal custody. Globally, gender inequalities persist, and explicit protections of gender equality in constitutions have made a difference in countries like Nepal, Zimbabwe, Tanzania, and Kuwait.
| Characteristics | Values |
|---|---|
| Does the Constitution protect sexual genders? | No, but the Supreme Court has used the equal protection clause to address sex discrimination issues |
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What You'll Learn

The Equal Protection Clause
In its 1996 decision *Romer v. Evans*, the Supreme Court struck down a state constitutional amendment that overturned local ordinances prohibiting discrimination against homosexuals, lesbians, or bisexuals. The Court ruled that the Equal Protection Clause prevents states from excluding same-sex couples from civil marriage on the same terms and conditions as opposite-sex couples.
Despite the Equal Protection Clause, the Trump administration issued an executive order in 2025 calling on the Federal Bureau of Prisons (BOP) and the Department of Homeland Security (DHS) to enforce a blanket policy forcing transgender women into men’s prisons and detention centres.
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Gender discrimination claims
The U.S. Constitution does not explicitly protect sexual genders, but the Supreme Court has used the equal protection clause to address sex discrimination issues. The equal protection clause ensures that laws do not unfairly discriminate on the basis of sex and has helped advance women's rights and promote more equal treatment under the law. The Supreme Court has also developed standards to review gender discrimination claims, which are examined with "intermediate scrutiny".
In addition to the equal protection clause, the Due Process Clause has been used to protect against gender discrimination. In the case of Obergefell v. Hodges, the Court invalidated several state laws limiting the licensing and recognition of marriage to two people of the opposite sex. The Court ruled that the Due Process Clause and the Equal Protection Clause are closely related and that the Equal Protection Clause prevents states from excluding same-sex couples from civil marriage on the same terms and conditions as opposite-sex couples.
Despite these protections, gender inequalities persist in the economy, education, political representation, and other areas of public and private life. Globally, women earn 24% less than men, and 104 countries prohibit women's employment in specific jobs. In low-income countries, just 66 girls finish secondary school for every 100 boys. Gender-based violence affects women in every country, and one-third of the world's countries have no laws against sexual harassment in the workplace.
Explicit protections of gender equality in the constitution have made a difference in some countries. For example, in Nepal, the constitution's gender equality provision provided the basis for a new law prohibiting marital rape. In Zimbabwe and Tanzania, courts found that establishing lower ages of marriage for girls than for boys is unconstitutional. In Kuwait, the Administrative Court invalidated a ban on female applicants to the Justice Ministry, based on gender equality in the constitution.
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Gender-based violence
The U.S. Constitution does not explicitly protect sexual genders, but the U.S. Supreme Court has used the equal protection clause to address sex discrimination issues. This clause has been used to advance women's rights and promote more equal treatment under the law. The Supreme Court has also developed standards to review claims of gender discrimination, which are examined with "intermediate scrutiny".
In addition, the Supreme Court's decision in Obergefell v. Hodges invalidated several state laws limiting the licensing and recognition of marriage to two people of the opposite sex. The Court ruled that the Equal Protection Clause prevents states from excluding same-sex couples from civil marriage on the same terms and conditions as opposite-sex couples.
Despite these protections, gender-based violence remains a pervasive issue, affecting women in every country. One-third of the world's countries have no laws against sexual harassment in the workplace, and explicit protections of gender equality in the constitution have proven effective in addressing this issue. For example, in Nepal, the constitution's gender equality provision provided the basis for a new law prohibiting marital rape.
Furthermore, the Trump administration's executive orders promoting sex discrimination have raised concerns about the enforcement of protections guaranteed by the Constitution. One such order calls on the Federal Bureau of Prisons (BOP) and the Department of Homeland Security (DHS) to enforce a blanket policy of placing transgender women in men's prisons and detention centres, ignoring the guidelines of the Prison Rape Elimination Act (PREA).
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Same-sex marriage
The US Constitution does not explicitly protect sexual genders, but the equal protection clause has been used to address sex discrimination issues and advance women's rights. The Fourteenth Amendment's Equal Protection Clause has also been used to protect the right of same-sex couples to marry. In the 1996 case of *Romer v. Evans*, the Supreme Court struck down a state constitutional amendment that overturned local ordinances prohibiting discrimination against homosexuals, lesbians, or bisexuals. The Court also prohibited any state or local government action to remedy discrimination or grant preferences based on sexual orientation.
In the 2015 case of *Obergefell v. Hodges*, the Court invalidated several state laws limiting the licensing and recognition of marriage to two people of the opposite sex. The Court ruled that the Equal Protection Clause prevents states from excluding same-sex couples from civil marriage on the same terms and conditions as opposite-sex couples.
While the US Constitution does not explicitly protect sexual genders, the Supreme Court has interpreted it to protect against sex discrimination and to guarantee the right of same-sex couples to marry.
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Transgender rights
The U.S. Constitution does not explicitly protect sexual genders, but the equal protection clause has been used to address sex discrimination issues and advance women's rights. The Fourteenth Amendment's Equal Protection Clause has been interpreted to prevent states from excluding same-sex couples from civil marriage on the same terms and conditions as opposite-sex couples.
In the case of *Obergefell v. Hodges*, the Court invalidated several state laws limiting the licensing and recognition of marriage to two people of the opposite sex. The Court ruled that the Equal Protection Clause prevents states from excluding same-sex couples from civil marriage on the same terms and conditions as opposite-sex couples.
In addition, the Supreme Court has struck down state constitutional amendments that overturned local ordinances prohibiting discrimination against homosexuals, lesbians, or bisexuals. However, the Trump administration's executive orders promoting sex discrimination have had negative impacts on transgender people, such as enforcing a blanket policy of placing transgender women in men's prisons and detention centres.
Around the world, gender inequalities persist in various areas, including the economy, education, and political representation. Explicit protections of gender equality in the constitution have made a difference in some countries, such as Nepal, where the constitution's gender equality provision provided the basis for a new law prohibiting marital rape.
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Frequently asked questions
Yes, the US Constitution's equal protection clause has been used to address sex discrimination issues and ensure that laws do not unfairly discriminate on the basis of sex.
Yes, the US Constitution's equal protection clause has been used to address gender discrimination issues.
Yes, in 1996 the Supreme Court struck down a state constitutional amendment that overturned local ordinances prohibiting discrimination against homosexuals, lesbians, or bisexuals.
While the US Constitution does not explicitly mention transgender people, it does include protections against sex discrimination that may be applicable to transgender people.
Yes, in 2015 the Court ruled that the Equal Protection Clause prevents states from excluding same-sex couples from civil marriage on the same terms and conditions as opposite-sex couples.

























