Texas's 21st congressional district

Texas's 21st congressional district of the United States House of Representatives serves the area north of San Antonio and a significant portion of Austin in the state of Texas. Towns entirely or partially in this district include Boerne, Fredericksburg, Ingram, Kerrville, Kyle, New Braunfels, and San Marcos. The current Representative from the 21st district is Chip Roy.

2006
In the case of League of United Latin American Citizens v. Perry, 548 U. S. 399 (2006), the U.S. Supreme Court ruled that the configuration of Texas' 15th, 21st, 23rd, 25th and 28th congressional districts as drawn by the Texas Legislature violated the National Voting Rights Act of 1965. Replacement district boundaries for the 2006 election were subsequently issued for the five districts by the local federal district court, and on election day in November, these five districts had open primaries, with candidates being elected for receiving over 50 percent of the vote. Runoff elections were held in December to decide elections in which no candidate gained an absolute majority in November.

In the 2006 election, Lamar Smith defeated veteran and college administrator John Courage with 60% of the vote.

2010
In the 2010 election, Lamar Smith defeated Lainey Melnick with 68.9 percent of the vote. Melnick, an Austin real estate broker, officially filed papers with the Federal Election Commission on June 23, 2009 to become a candidate.

2012
Incumbent Lamar Smith faced five challengers in the 2012 general election on November 6, 2012: Candace Duval (Dem), John-Henry Liberty (Lib), Fidel Castillo (Grn), Bill Stout (Grn), and Carlos Pena (Ind).

2018
Lamar Smith did not run for reelection in 2018.

On the Republican side, 18 candidates competed in the March 6 primary, in which no one received a majority. The first- and second-place finishers were, respectively, attorney Chip Roy, who served as chief of staff to Sen. Ted Cruz (R-Tex.) and senior advisor to Texas Gov. Rick Perry (R), and Matt McCall, owner of a business providing human tissue for American military hospitals. Roy and McCall advanced to a May 22 runoff, which Roy won with 52.7% of the vote.

On the Democratic side, four candidates ran to replace Smith: Joseph Kopser, entrepreneur and Army veteran; Derrick Crowe, activist; Elliott McFadden, executive director of Austin B-cycle; and Mary Street Wilson, pastor. No one received a majority in the March 6 primary, so the top two finishers, Wilson and Kopser, advanced to a runoff on May 22. Kopser flipped the primary result in the runoff against Wilson, winning the nomination with 58% of the vote.

2020
The incumbent, Chip Roy, was unopposed for the Republican nomination. Former state Senator Wendy Davis won the Democratic primary runoff. Tom Wakely was nominated by the Green Party caucus. The state Supreme Court allowed his inclusion after Wendy Davis tried unsuccessfully to have him removed from the ballot. Perennial candidate Arthur DiBianca was the Libertarian nominee; a last-minute lawsuit by Republicans to block DiBianca and 43 other Libertarian Party candidates from the ballot failed.

2024
The incumbent, Chip Roy (R, Dripping Springs), an attorney, ran unopposed and was nominated in the March 5, 2024 Republican primary. https://www.tpr.org/government-politics/2024-03-05/live-2024-san-antonio-primary-election-results/ref> Dr. Kristin Hook (D, San Antonio), a biologist formerly employed as a biologist by US Government Accountability Office, ran unopposed and was nominated in the March 5, 2024 Democratic primary. https://www.tpr.org/government-politics/2024-03-05/live-2024-san-antonio-primary-election-results/ref> Bob King (L, New Braunfels), a retired energy finance executive and nonprofit leader, ran unopposed and was nominated at the Libertarian district convention on March 23, 2024. https://www.bobkingfortexas-21.org/images/126540/King_Wins_Libertarian_Nomination_main.pdf/ref>