a city and the county-seat of Grady county, Oklahoma, U. S. A., near the Washita river, about 45 m. S. S. W. of Oklahoma city. Pop. (1900) 3209; (1907) 7862, including 1043 negroes; (1910) 10,320. Chickasha is served by the St Louis & San Francisco, the Chicago, Rock Island & Pacific and the Oklahoma Central railways. It is the trade centre of a very fertile section of the Washita Valley, whose principal products are Indian corn, cotton, fruits and vegetables and live-stock. The city has various manufactures, including flour, cotton-seed oil, lumber, furniture and farm implements. Chickasha was founded in 1892 and was chartered as a city in 1899.