Republican A.C. Hamlin was Oklahoma 's first black legislator , serving in the first legislature of the new state .
The Republican at the time of statehood in 1907 was not the party of most Oklahomans , but was the party of most African - Americans .
Republican A.C. Hamlin was Oklahomans 's first black legislator , serving in the first legislature of the new state .
The Republican at the time of statehood in 1907 was not the party of most Oklahomans , but was the party of most African - Americans .