The Martin Luther King Jr. Memorial Library (MLKML) is the central facility of the District of Columbia Public Library (DCPL), constructed and named in honor of the American civil rights leader Martin Luther King Jr. Its address is 901 G St. NW in Downtown Washington, D.C., with its main entrance between 9th and 10th St. on the opposite corner to Gallery Place station, and the Smithsonian American Art Museum. The library is located in and around the Chinatown, Mount Vernon Square, and Penn Quarter neighborhoods.

The District of Columbia Public Library (DCPL) is the public library system for Washington, D.C. The system includes 26 individual libraries including Martin Luther King Jr. Memorial Library, DCPL's central library.