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
Capital punishment in Oklahoma Board. Two inmates post-"Furman" had their death sentences commuted. In earlier years Governor Lee Cruce commuted every death sentence imposed during his administration (1911–1915). Nitrogen gas inhalation option was added by the Oklahoma Legislature in 2015 and has never been used in a judicial execution, though it is routinely used to give a painless death in animal euthanasia. On December 16, 2010, Oklahoma became the first American state to use pentobarbital, in the execution of John David Duty. In 2014, Oklahoma placed scheduled executions on hold until the state's Department of Corrections implemented eleven proposed improvements in protocols governing capital