Oklahoma's 2nd congressional district is one of five United States congressional districts in Oklahoma and covers approximately one-fourth of the state in the east. The district borders Arkansas, Kansas, Missouri, and Texas and includes (in whole or in part) a total of 24 counties. The district is represented by Republican Markwayne Mullin, becoming only the second Republican after Tom Coburn to hold the seat since 1923. Mullin was first elected in 2012, following the retirement of four-term Democratic incumbent Dan Boren.