Grady County Assessor Office 326 W Choctaw Ave Chickasha, OK 73018 Phone : (405) 224-4361 Business Category Public Finance Taxation & Monetary Policy Grady County Of--county Court House, County Assessor 326 W Choctaw, OK 73020 Phone : (405) 224-4361 Business Category Government Offices-County Government Offices & Public Schools