Disfranchisement after the Reconstruction era in the United States, especially in the Southern United States, was based on a series of laws, new constitutions, and practices in the South that were deliberately used to prevent black citizens from registering to vote and voting. These measures were enacted by the former Confederate states at the turn of the 20th century. Efforts were also made in Maryland, Kentucky, and Oklahoma. Their actions were designed to thwart the objective of the Fifteenth Amendment to the United States Constitution, ratified in 1870, which prohibited states from depriving voters of their voting rights based on race. The laws were frequently written in ways to be ostensibly non-racial on paper, but were implemented in ways that selectively suppressed black voters apart from other voters.

The Fifteenth Amendment to the United States Constitution prohibits the federal government and each state from denying or abridging a citizen's right to vote "on account of race, color, or previous condition of servitude." It was ratified on February 3, 1870, as the third and last of the Reconstruction Amendments.