Located in the Abernethy Building, the Harmon County Historical Museum features rotating displays depicting the life of pioneers and residents, dinosaur fossils, covered wagon and blacksmith shop. The works of local artists are also showcased.
The Harmon County Courthouse is listed on the National Register of Historic Places.
Harmon County evolved from the tract of land variously claimed as Greer County, Texas, Indian Territory, Oklahoma Territory, and Greer County, Oklahoma. On June 2, 1909