Downtown Washington Historic District is a national historic district located at Washington, Franklin County, Missouri.

The district developed between about 1849 and 1940 and includes representative examples of Greek Revival, Late Victorian, and American Craftsman style architecture.

Located in the district is the separately listed Henry C. Thias House.

Notable buildings include the St. Francis Borgia Catholic Church complex, U.S. Post Office (1922), Waterworks Building, Calvin Theater (1909), railway depot (1923), and Masonic lodge (1929).

This article about a property in Franklin County, Missouri on the National Register of Historic Places is a stub.