The North Ninth Street Historic District is a national historic district located at Downtown Columbia, Missouri, USA. It encompasses seven contributing buildings in an area that has historically been a center of commerce, recreation and culture. They were built between about 1885 and 1954, and are the L.J. Slate Billiard Hall, Allen Arnold Building, A. Victor Building, Lafayette Hume Building, Varsity Theatre (1927), Crosswhite Bakery, and Hume Building. The popular music venue The Blue Note is located within the district.