Oklahoma county is located in the middle of the state with Oklahoma City serving as the county seat as well as the State Capital. Famous Route 66 skirts the city's north and west sides. The city is about halfway between the two termini of Chicago and Santa Monica, CA.
The major waterway in the county is the North Canadian River which enters from Canadian County and flows southeasterly before taking a big turn to the north. It then returns to its southeasterly course exiting where Lincoln County meets Pottawatomie County.
Post-high school education in the county can be pursued at Oklahoma City University and University of Central Oklahoma to name just two.
More than 100 sites in the county have been added to the National Register and include "Ringing the Wild Horse" Site near Jones, the Heritage Hills Historic and Architectural District and the India Temple Shrine Building, both in OKC and the Old North Tower on the UCO campus in Edmond.
The county population on July 1, 1999, was 636,539, an increase of 36,928 over the 1990 census.