The essentially new seat has Republican Corey Brooks, a Navy veteran and rancher from Washington, OK, who is facing Democrat Mike Fullerton, a senior roadway designer from Newcastle.
In Edmond, voters will decide between Sen. Clark Jolley, R-Edmond, and Richard Prawdzienski, an independent candidate who considers himself a libertarian.
Due to term limits, this would be Jolley's final term in office. Prawdzienski has pledged to shake up the status quo if elected, while Jolley is an influential senator among Republican leadership, chairing several key committees.
In Lawton, two-term incumbent Don Barrington, a Republican, is being challenged by Tony Terrill, a Democrat, who teaches middle school.