The Garrett Park Historic District is a national historic district located at Garrett Park, Montgomery County, Maryland. It's a 154-acre (62 ha) residential community incorporated in 1891, along the B & O Railroad. The older community includes a number of late Victorian homes. During the 1920s, the town expanded with a set of 40,640-square-foot (3,776 m2), "Chevy" houses built by Maddux, Marshall & Co. The district also includes a set of Prairie Style homes designed and built by Alexander Richter during the 1950s. It was listed on the National Register of Historic Places in 1975.