American Indian reservations in the United States are specific parcels of land, set aside by the the federal government as a residence for specific tribe(s) or groups of American Indians. The government administrative office for a reservation was an agency. Boundaries of reservations have changed over time, some significantly. Some tribal reservations were even relocated to a different state. Some reservations have been terminated, but their historical records may exist.

In addition to the pages for each reservation listed under this category, names of reservations are also listed under the topic "American Indians" for each state, and under a subcategory of "[state] Indian Reservations."