2018 United States House of Representatives elections in Oklahoma

The 2018 United States House of Representatives elections in Oklahoma were held on November 6, 2018, to elect the five U.S. representatives from the state of Oklahoma, one from each of the state's five congressional districts. The elections coincided with other elections to the House of Representatives, elections to the United States Senate and various state and local elections. Primary elections were held on June 26 and runoff elections were held two months later on August 28. The state's U.S. House delegation Republican majority changed from 5–0 to 4–1. As of 2023 this is the only time since 2010 that Democrats won any house race in Oklahoma.

District
Results of the 2018 United States House of Representatives elections in Oklahoma by district:

District 1
The 1st district is located in the Tulsa metropolitan area and includes Creek, Rogers, Tulsa, Wagoner and Washington counties. Incumbent Republican Jim Bridenstine, who had represented the district since 2013, resigned on April 23 to become NASA Administrator. He was re-elected unopposed in 2016. The district had a PVI of R+17.

Republican primary
During his initial election in 2012, Bridenstine self-imposed a three term limit. Bridenstine confirmed that he will honor his term-limit pledge.

Bridenstine became Administrator of NASA in the Donald Trump administration, and resigned on April 23.

Nominee

 * Kevin Hern, businessman

Eliminated in primary

 * Andy Coleman, veteran
 * Nathan Dahm, state senator
 * Tim Harris, former Tulsa County District Attorney
 * Danny Stockstill

Declined

 * Dewey F. Bartlett Jr., former Mayor of Tulsa
 * John D. Doak, Oklahoma Insurance Commissioner
 * Dan Newberry, state senator
 * Everett Piper, Oklahoma Wesleyan University President
 * Scott Pruitt, Administrator of the Environmental Protection Agency, former State Attorney General and candidate for this seat in 2002
 * T.W. Shannon, former Speaker of the Oklahoma House of Representatives

Nominee

 * Tim Gilpin, attorney, and former Oklahoma State Board of Education member

Eliminated in primary

 * Amanda Douglas, business analyst, energy consultant and member of the Cherokee Nation
 * Gwendolyn Fields
 * Mark Keeter
 * David Hullum

Declined

 * Kathy Taylor, former Mayor of Tulsa

District 2
The 2nd district is located in the regions of Green Country and Kiamichi Country and includes the city of Muskogee and numerous sparsely populated counties. The incumbent is Republican Markwayne Mullin, who has represented the district since 2013. He was re-elected with 71% of the vote in 2016.

Republican primary
Mullin had pledged to serve only three terms when he was first elected in 2012. During the 2016 campaign, Mullin stated he was reassessing his pledge, and refused to rule out running again in 2018.

Nominee

 * Markwayne Mullin, incumbent U.S. Representative

Eliminated in primary

 * Brian Jackson
 * Jarrin Jackson, veteran, conservative activist and candidate for the seat in 2016
 * John McCarthy

Declined

 * Josh Brecheen, state senator
 * George Faught, state representative
 * Todd Hiett, Oklahoma Corporation Commissioner
 * Charles McCall, state representative

Nominee

 * Jason Nichols, Mayor of Tahlequah

Eliminated in primary

 * Elijah McIntosh
 * Clay Padgett, retired army lieutenant colonel and public educator

Declined

 * Bill John Baker, Principal Chief of the Cherokee Nation
 * Sean Burrage, Southeastern Oklahoma State University President
 * Kalyn Free, former District Attorney for Haskell & Pittsburg counties and candidate for this seat in 2004

District 3
The 3rd district is located in Western Oklahoma. The largest district in Oklahoma and one of the largest in the country, it includes the Oklahoma Panhandle, Ponca City and the city of Stillwater as well as the Osage Nation. Incumbent Republican Frank Lucas, who had represented the district since 2003 and previously represented the 6th district from 1994 to 2003, ran for re-election. He was re-elected with 78% of the vote in 2016. The district had a PVI of R+27.

Nominee

 * Frank Lucas, incumbent U.S. Representative

Nominee

 * Frankie Robbins, engineer

Eliminated in primary

 * Murray Thibodeaux

District 4
The 4th district is located in South Central Oklahoma and includes the suburbs of Oklahoma City, such as the counties of Canadian, Comanche and Cleveland and numerous other sparsely populated counties. Incumbent Republican Tom Cole, who had represented the district since 2003, ran for re-election. He was re-elected with 70% of the vote in 20. The district had a PVI of R+20.

Nominee

 * Tom Cole, incumbent U.S. Representative

Eliminated in primary

 * James Taylor

Nominee

 * Mary Brannon, teacher

Eliminated in primary

 * Fred Gipson, former Chief Counsel to the University of Oklahoma
 * Roxann Klutts
 * Mallory Varner

Withdrawn

 * John McKenna

District 5
The 5th district is located in Central Oklahoma and centered around the state capital, Oklahoma City, and the surrounding areas such as Edmond and Shawnee. Incumbent Republican Steve Russell, who had represented the district since 2015, ran for re-election. He was re-elected with 57% of the vote in 2016. The district had a PVI of R+10. Democrat Kendra Horn won by a margin of under 1% in what was considered an upset.

Nominee

 * Steve Russell, incumbent U.S. Representative

Eliminated in primary

 * Gregory Dunson
 * DeJuan Edwards

Nominee

 * Kendra Horn, attorney and communication technology firm strategic consultant

Eliminated in primary

 * Elysabeth Britt, human resources professional
 * Tom Guild, former tenured professor at the University of Central Oklahoma, nominee for the seat in 2010 & 2012 and candidate for this seat in 2014 & 2016
 * Leona Kelley-Leonard, chair of the Seminole County Democratic Party and candidate for this seat in 2014 & 2016
 * Tyson Meade, singer and songwriter
 * Eddie Porter, retired state planner for the Oklahoma Department of Human Services

Declined

 * Al McAffrey, state senator and nominee for this seat in 2014 & 2016