The Mutual Musicians' Foundation Building is a historic building at 1823 Highland Avenue in Kansas City, Missouri. It is also known as the Mutual Musicians Association Building or the Musician's Union Local or the Local No. 627 of the American Federation of Musicians.
It was a center of the development of the "Kansas City Style" of jazz, and was immortalized in the song "627 Stomp".
Famous members of the Mutual Musicians Foundation included Count Basie, Bennie Moten, Jay McShann, George F. Lee, singer Julia Lee, trumpeter Hot Lips Page, tenor saxophonists Dick Wilson, Herschel Evans and Lester Young, alto saxophonist Charlie Parker, drummer Baby Lovett, and pianist Pete Johnson.
The building was declared a National Historic Landmark in 1981. It continues to be used as an active performing venue, and also houses a museum.