Washington County is a county in the U.S. state of Oklahoma. It is, in area, the third smallest county in Oklahoma. As of 2000, 48,996 people lived there. Its county seat is Bartlesville.
Washington County is a county in the U.S. state of Oklahoma. It is, in area, the third smallest county in Oklahoma. As of 2000, 48,996 people lived there. Its county seat is Bartlesville.