2010 Oklahoma gubernatorial election

The 2010 Oklahoma gubernatorial election was held on November 2, 2010, to elect the governor of Oklahoma. Due to term limits established by the Oklahoma Constitution, incumbent Democratic Governor Brad Henry could not seek re-election. The race had been hotly contested by both political parties, with several well-known Oklahomans announcing their candidacy up to two years before the election. This was the first time a woman challenged another woman for Governor of Oklahoma.

As both parties nominated female candidates (Jari Askins for the Democrats and Mary Fallin for the Republicans), and as no third-party or write-in candidate qualified for the ballot, Oklahoma was guaranteed its first-ever female governor. In 2008, Republicans won majorities in both chambers of the state legislature for the first ever; as they expanded these majorities in the 2010 elections and Fallin won the governorship, a Republican state government trifecta was established for the first time since statehood once Fallin was sworn in on January 10, 2011.

Askins carried only four counties: her home county of Stephens and neighboring Comanche, Cotton, and Jefferson. While Fallin won all other 73 counties (of which she flipped 70), her margins varied, ranging from narrow wins in much of Eastern Oklahoma to a 66-point victory in staunchly Republican Beaver County.

Fallin was the first Republican to win Atoka County, Choctaw County, Coal County, Haskell County, Hughes County, Johnston County, Latimer County, LeFlore County, McCurtain County, Okfuskee County, Pittsburg County, and Pushmataha County in a gubernatorial election since Oklahoma statehood. Fallin was the first non-Democrat to win Tillman County, which had voted for the Democratic candidate for governor in each election since Oklahoma statehood, thus breaking a 103-year streak of voting Democratic.