John Graves Leeper (May 23, 1854 – March 2, 1931) was an American politician and businessman who served as the elected Oklahoma Secretary of State between 1927 and 1931.

The brothers opened lumber mills in Denison, Gainesville, and Bowie as well as in Oklahoma Territory and in Chickasaw Nation, Indian Territory along the Atchison, Topeka and Santa Fe Railway.

They eventually expanded into Anadarko near the Chicago, Rock Island and Pacific Railroad.

[4] One of his brothers, Cyrus S. Leeper, served as a member of the Oklahoma Constitutional Convention.

[4] John Leeper was elected in 1926 and served as the Oklahoma Secretary of State between 1927 and 1931.