The 15th Amendment to the U.S. Constitution prohibits the federal government and every state from denying or restricting a citizen’s right to vote because of race, color, or previous condition of servitude. Ratified on February 3, 1870, it was the last of the three Reconstruction Amendments, following the Thirteenth (abolishing slavery) and the Fourteenth (guaranteeing citizenship and equal protection).1National Archives. 15th Amendment to the U.S. Constitution: Voting Rights (1870) Its language is short, its scope is narrower than most people expect, and for nearly a century after ratification it changed very little on the ground.
The Full Text
The amendment has two sections. Section 1 states that the right of U.S. citizens to vote “shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude.” Section 2 gives Congress the power to enforce that guarantee through legislation.2Congress.gov. U.S. Constitution – Fifteenth Amendment
Three prohibited grounds appear in that single sentence: race, color, and previous condition of servitude. The first two are self-explanatory. The third was aimed at formerly enslaved people, ensuring that having once been held in bondage could never be used as a reason to keep someone from voting.
What the Amendment Prohibits
The 15th Amendment is a restriction on government, not a grant of a personal right. It tells federal, state, and local governments what they cannot use as a reason to deny the vote. It does not, on its own terms, guarantee anyone an affirmative right to cast a ballot. That distinction left states free to impose voting restrictions that did not explicitly turn on race, including property requirements, residency rules, and poll taxes.2Congress.gov. U.S. Constitution – Fifteenth Amendment
The amendment also reaches only government action. Private organizations, employers, and individuals are not bound by it. A private club that excluded members by race in an internal election would not violate the 15th Amendment, though federal civil rights statutes might reach that conduct. The constitutional prohibition itself applies from Congress down to local election boards, and stops there.
What It Does Not Cover
Because Section 1 lists only race, color, and previous condition of servitude, other forms of voting discrimination required separate constitutional amendments to address.
Sex is not on the list. Women were denied the vote for another fifty years, until the Nineteenth Amendment was ratified in 1920. The Supreme Court confirmed this gap in 1875 in Minor v. Happersett, holding that the Constitution did not guarantee women the right to vote because suffrage was not among the “privileges or immunities” of citizenship.
Age is not on the list either. Voting-age discrimination was not addressed until the Twenty-Sixth Amendment in 1971 set the voting age at eighteen. Poll taxes, used extensively to keep poor Black voters from the ballot box, were not banned in federal elections until the Twenty-Fourth Amendment in 1964, and it took a Supreme Court ruling two years later to extend that ban to state elections.
The 15th Amendment also does not directly prohibit felon disenfranchisement. Section 2 of the Fourteenth Amendment explicitly contemplates that states may deny the vote for “participation in rebellion, or other crime,” and the Supreme Court relied on that language in Richardson v. Ramirez (1974) to uphold felon disenfranchisement laws against constitutional challenge. Statistical disparities in how those laws affect Black Americans are generally not enough on their own to state a 15th Amendment claim, which requires proof of discriminatory purpose. Federal courts remain split on whether the Voting Rights Act reaches felon disenfranchisement at all.
How States Circumvented It for Nearly a Century
Almost immediately after ratification, Southern states developed workarounds that stripped Black citizens of the vote without explicitly mentioning race.
Literacy tests required voters to read and interpret passages of text, but registrars had sole discretion over who passed and who failed. A white voter might be asked to read a simple sentence; a Black voter might be handed a dense legal passage and told to explain it. The tests were facially neutral and administered with blatant racial bias.
Grandfather clauses offered another route. These provisions exempted a voter from a literacy test or other requirement if their grandfather had been eligible to vote before the Civil War. Virtually no Black citizens had voting grandfathers, so the clause worked as a racial screen without naming race. The Supreme Court struck down Oklahoma’s grandfather clause in Guinn v. United States in 1915, recognizing it as an attempt to recreate the conditions the 15th Amendment had abolished.3Justia. Guinn and Beal v. United States
Poll taxes, white-only primaries, and outright intimidation filled out the toolkit. These tactics were effective enough that by the early twentieth century Black voter registration in some Southern states had dropped to single digits. The amendment existed on paper. Without enforcement, it did little else.
How Congress Enforced It
Section 2 of the amendment gives Congress authority to enforce its protections through legislation.2Congress.gov. U.S. Constitution – Fifteenth Amendment For most of the amendment’s first century, Congress did little with that power. That changed in 1965.
The Voting Rights Act of 1965
The Voting Rights Act is the most significant statute ever passed under the amendment’s enforcement clause. It banned literacy tests, authorized federal examiners to register voters in covered jurisdictions, and created a preclearance system under Section 5 that required certain states and counties with histories of discrimination to get federal approval before changing any voting rules.4National Archives. Voting Rights Act (1965) Section 4 supplied the coverage formula that identified which jurisdictions were subject to preclearance, based on their use of discriminatory tests and low voter registration or turnout.5Department of Justice. Section 4 Of The Voting Rights Act
Section 2 of the Act, meanwhile, prohibits any voting practice that results in members of a racial or language minority having less opportunity than other voters to participate in the political process. After 1982, plaintiffs bringing Section 2 claims no longer had to prove that legislators acted with racial animus; they could win by showing discriminatory results based on the totality of circumstances.6Office of the Law Revision Counsel. 52 USC 10301 – Denial or Abridgement of Right to Vote on Account of Race or Color That statutory standard is more forgiving than a claim brought directly under the 15th Amendment, which still requires proof of discriminatory intent.7Department of Justice. Section 2 Of The Voting Rights Act
Shelby County and the End of Preclearance
Preclearance worked as designed for nearly fifty years. Then, in Shelby County v. Holder (2013), the Supreme Court struck down the Section 4(b) coverage formula, holding that it rested on decades-old data that no longer reflected current conditions.8Justia. Shelby County v. Holder The Court did not invalidate Section 5 itself, but without a formula to determine which jurisdictions needed federal approval, the preclearance requirement became unenforceable. Congress could pass a new formula. It has not.
Key Supreme Court Decisions
A handful of cases have shaped the 15th Amendment’s meaning more than any others:
- Guinn v. United States (1915) struck down Oklahoma’s grandfather clause, treating it as a transparent attempt to restore the racial barriers the amendment eliminated.3Justia. Guinn and Beal v. United States
- Shaw v. Reno (1993) held that redistricting maps drawn so bizarrely that only race explains them require strict judicial scrutiny and must be narrowly tailored to serve a compelling government interest.9Justia. Shaw v. Reno
- Shelby County v. Holder (2013) invalidated the Voting Rights Act’s coverage formula, effectively suspending federal preclearance of voting changes in jurisdictions with histories of discrimination.8Justia. Shelby County v. Holder
Together these decisions trace an arc from striking down obvious racial barriers, to policing race-conscious redistricting, to scaling back the federal enforcement tools that first made the amendment’s promise real.
Where the Amendment Stands Today
The constitutional baseline set in 1870 has not moved: no government in the United States can deny or restrict the right to vote based on race, color, or a person’s history of enslavement. A claim brought directly under the amendment still requires proof of discriminatory intent, which is a high bar because laws rarely announce a racist purpose. Section 2 of the Voting Rights Act remains available as a statutory cause of action with a more accessible results-based standard, though recent Supreme Court decisions have made those claims harder to win. And the enforcement power in Section 2 of the amendment itself is still there for Congress to use whenever it chooses to.