The Oklahoma State League was a Class D level minor baseball league based in Oklahoma that existed in 1912 and again from 1922 to 1924. Hall of Fame pitcher Carl Hubbell played in the league, making his professional debut with the 1923 Cushing Refiners.
The league was represented by eight teams in 1912: the Anadarko Indians, Holdenville Hitters, McAlester Miners, Muskogee Indians, Oklahoma City Senators, Okmulgee Glassblowers, Tulsa Terriers and Guthrie Spas. The league disbanded on July 29, with the Glassblowers in first place and the Guthrie team in last.
Another incarnation of the league came about in 1922, represented by the Chickasha Chicks, Clinton Bulldogs, Duncan Oilers, El Reno Railroaders, Wilson Drillers and Guthrie Linters team. The Oilers finished first in the league, though the Chicks were the league champions, winning the league's playoff series.
In 1923, the league was represented by the Cushing Refiners, Bristow Producers, Duncan Oilers, Clinton Bulldogs, El Reno Railroaders, Shawnee Indians, Drumright Boosters/Ponca City Poncans and the Guthrie Linters. The Refiners finished in first, however Bristow won the league championship.
The league played its final season in 1924, represented by the Ardmore Bearcats/Pawhuska Huskies, Bristow Producers, Cushing Refiners, Shawnee Indians, Duncan Oilers, Ponca City Poncans, Blackwell Gassers and the McAlester Diggers, also based in Guthrie, Wewoka and Enid. The league disbanded on July 8, with Ardmore/Pawhuska in first and the Guthrie/McAlester/Wewoka/Enid Harvesters team in last place.