Grady -- U.S. County in Oklahoma Population (2000): 45516 Housing Units (2000): 19444 Land area (2000): 1100.961373 sq. miles (2851.476745 sq. km) Water area (2000): 4.337415 sq. miles (11.233853 sq. km) Total area (2000): 1105.298788 sq. miles (2862.710598 sq. km) Located within: Oklahoma (OK), FIPS 40 Location: 35.050405 N, 97.902417 W Headwords: Grady Grady, OK Grady County Grady County, OK