Oklahoma County, Oklahoma Oklahoma County, Oklahoma Oklahoma County is a county located in the central part of the U.S. state of Oklahoma. As of the 2010 census, the population was 718,633, making it the most populous county in Oklahoma. The county seat is Oklahoma City, the state capital. Oklahoma County is at the heart of the Oklahoma City Metropolitan Statistical Area. Oklahoma County is one of seven counties in the United States to share the same name as the state it is located in (the other six counties are Arkansas County, Hawaii County, Idaho County, Iowa County, New York County (known commonly as
Oklahoma State Highway 156 Oklahoma State Highway 156 State Highway 156, abbreviated SH-156, is a highway maintained by the U.S. state of Oklahoma. Spanning through the north-central part of the state, it connects the town of Marland, Oklahoma to US-60/US-77/US-177 in the north to US-77 in the west. It is the former alignment of US-77. Starting at US-77, the highway goes east for until reaching Marland, where it turns northward. later, after crossing from Noble County into Kay County, it ends at US-60/US-77/US-177 west of Ponca City. SH-156 is designated as the 101 Ranch Memorial Road. A historical marker to the ranch is located