Olin Wellborn was a United States representative from Texas and a United States district judge of the United States District Court for the Southern District of California.

Texas's 3rd congressional district of the United States House of Representatives is in the suburban areas north and northeast of Dallas. It encompasses much of Collin County, including McKinney and Allen, as well as parts of Plano, Frisco, and Prosper. Additionally, the district includes all but the southern portion of Hunt County. The district is also home to a public four-year university, Texas A&M University-Commerce, as well as Collin College.