Welcome to Washington County Communities and Businesses Find information about Washington County, Oklahoma AGENDAS Correctional Facilities Authority Industrial Development Trust Authority Public Facilities Authority Washington County Public Facilities Authority PUBLIC ACCESS County Clerk Sign up here to be notified when a document is recorded in your name. Read More County Treasurer Washington County Tax Roll Inquiry. Read More HOW TO Choose a common county task Proud Supporters of our Local Law Enforcement. CLICK BELOW for more information on the "Back the Blue" Campaign! Read More Hours: Monday-Friday 8am to 5pm Phone: (918) 337-2841 NEWS & EVENTS No upcoming events. Please check back later.