The Rourke Art Museum is a fine arts museum in Moorhead, Minnesota, United States, founded by James O'Rourke. The art museum can be found at 521 Main Avenue in a historic Federal Courthouse and Post Office, erected in 1915. The building was included in a study of historic properties in Clay County, which said the building "shows the influence of Federal government function in most towns." It was listed on the National Register of Historic Places in 1980.