The Civil Rights Act of 1964 (Pub.L. 88–352, 78 Stat. 241, enacted July 2, 1964) is a landmark civil rights and labor law in the United States that outlaws discrimination based on race, color, religion, sex, or national origin. It prohibits unequal application of voter registration requirements, and racial segregation in schools, employment, and public accommodations.

Initially, powers given to enforce the act were weak, but these were supplemented during later years. Congress asserted its authority to legislate under several different parts of the United States Constitution, principally its power to regulate interstate commerce under Article One (section 8), its duty to guarantee all citizens equal protection of the laws under the Fourteenth Amendment, and its duty to protect voting rights under the Fifteenth Amendment.

The legislation had been proposed by President John F. Kennedy in June 1963, but opposed by filibuster in the Senate. After Kennedy was assassinated on November 22, 1963, President Lyndon B. Johnson pushed the bill forward. The United States House of Representatives passed the bill on February 10, 1964, and after a 54-day filibuster, passed the United States Senate on June 19, 1964. The Act was signed into law by President Johnson at the White House on July 2, 1964 after the House of Representatives agreed to a subsequent Senate amendment to the bill passed the same day Johnson signed the bill into law.

The final vote in the House of Representatives was 290–130 with 138–34 (80%) in the House Republican Conference and 152–96 (61%) in the House Democratic Caucus with 11 members voting present or abstaining, while in the Senate the final vote was 73–27 with 27–6 (82%) in the Senate Republican Conference and 46–21 (69%) in the Senate Democratic Caucus.