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 58 Oklahoma State Highway 58 State Highway 58 (abbreviated SH-58) is the name of two state highways in Oklahoma. One of them runs for from Medicine Park to the Blaine–Custer County line near Hydro, and the other connects US-270/281/SH-3/33 to the Kansas state line, a length of . The northern section has one lettered spur route, SH-58A. SH-58 was originally a part of US-164. When US-164 was decommissioned in 1930, a section of the road in Major County that was left without a designation became SH-58. Since then, the highway has grown toward both the north and the south. With the