The Mount Rainier Historic District is a national historic district located at Mount Rainier, Prince George's County, Maryland, which began as a streetcar suburb located northeast of Washington, D.C. The district was built on a gently rolling rural landscape from about 1900 to 1940. The district contains more than 1,000 buildings, which are modestly scaled, detached, single-family, frame houses sited closely together with common setbacks. It consists primarily of single-family homes, with some small apartment buildings, a few duplexes, and single family homes that include a small storefront, usually located at the corner of an intersection. With the exception of five churches and a bank building known to have been designed by local architects, the remainder of the district's buildings are vernacular in character. Some homes contain Queen Anne detailing.