Longtown is a census-designated place (CDP) and unincorporated community[4] in Pittsburg County, Oklahoma, United States.

At the time of its founding, Longtown was located in Tobucksy County, Choctaw Nation, in the Indian Territory.

Longtown Creek formed the boundary between Tobucksy and Gaines County.

There were 3,059 housing units at an average density of 115.3 per square mile (44.5/km2).

26.2% of all households were made up of individuals, and 11.7% had someone living alone who was 65 years of age or older.