The Indian Citizenship Act of 1924, (43 Stat. 253, enacted June 2, 1924) was an Act of the United States Congress that declared Native Americans born within the United States are US citizens. Although the Fourteenth Amendment to the U.S. Constitution provides that any person born in the United States is a citizen, there is an exception for persons not "subject to the jurisdiction" of the federal government. This language was generally taken to mean members of various tribes that were treated as separate sovereignties: they were citizens of their tribal nations.

The act was proposed by U.S. Representative Homer P. Snyder (R-N.Y.), and signed into law by President Calvin Coolidge on June 2, 1924. It was enacted partially in recognition of the thousands of Native Americans who served in the U.S. Armed Forces during World War I.

The text of the 1924 Indian Citizenship Act reads as follows:

Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That all non citizen Indians born within the territorial limits of the United States be, and they are hereby, declared to be citizens of the United States: Provided That the granting of such citizenship shall not in any manner impair or otherwise affect the right of any Indian to tribal or other property.

Approved, June 2, 1924. June 2, 1924. [H. R. 6355.] [Public, No. 175.]

SIXTY-EIGHTH CONGRESS. Sess. I. CHS. 233. 1924.

See House Report No. 222, Certificates of Citizenship to Indians, 68th Congress, 1st Session, Feb. 22, 1924.

The act has been codified in the United States Code at Title 8, Sec. 1401(b).