The 2012 United States Senate election in Texas was held on November 6, 2012, along with other elections to the United States Senate the United States House of Representatives in additional states. Incumbent Republican U.S. Senator Kay Bailey Hutchison decided to retire instead of running for reelection to a fourth full term. This was the first open seat in this seat since 1957.^{[lower-alpha 1]}

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2012 United States Senate election in Texas

← 2006 November 6, 2012 2018 →
Turnout	64.8% (of registered voters) 49.7% (voting eligible)[1]
Nominee Ted Cruz Paul Sadler Party Republican Democratic Popular vote 4,440,137 3,194,927 Percentage 56.46% 40.62%
County results Congressional district results Precinct results Cruz:      40–50%      50–60%      60–70%      70–80%      80–90%      >90% Sadler:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%      No data
U.S. senator before election Kay Bailey Hutchison Republican Elected U.S. Senator Ted Cruz Republican

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Libertarian John Jay Myers was elected by nomination at the Texas Libertarian Party State Convention on June 8, 2012. After the first round of primary voting on May 29, 2012, a runoff was held on July 31, 2012, for both the Democratic Party and Republican Party. Former state representative Paul Sadler and former state solicitor general Ted Cruz respectively won the Democratic and Republican runoffs; Cruz won the general election by a wide margin.

In an interview with Texas Monthly published in December 2007, incumbent U.S. Senator Kay Bailey Hutchison stated that she would not seek reelection and might also resign from the Senate as early as 2009 to run for Governor of Texas.^[2] After the 2008 elections, Hutchison formed an exploratory committee to run for the governorship in 2010.^[3] State Republican Party Chairman Cathie Adams later called upon Hutchison to clarify when she would vacate the Senate so that other Republican candidates could make preparations to run.^[4]

On December 4, 2008, Hutchison set up an exploratory committee, setting up a primary battle with incumbent Republican governor Rick Perry.^[5] Fellow Texas U.S. Senator and National Republican Senatorial Committee Chairman John Cornyn tried to convince Hutchison to stay in the Senate, for fear of losing the seat to the Democrats.^[6] On January 15, 2009, Hutchison transferred nearly all the money, approximately $8 million, from her federal campaign account to her gubernatorial exploratory committee.^[7] On November 13, 2009, Hutchison announced that she would not resign from the Senate seat until after the primary on March 2, 2010.^[8]

Hutchison lost the gubernatorial primary to Perry and on March 31, 2010, she announced her intention to serve out her third term.^[9] On January 13, 2011, after some discussion about whether she would change her mind,^[10] Hutchison announced she would not seek re-election in 2012.^[11]

The Libertarian Party was qualified for the ballot (based on its 2010 performance at the polls). The Texas Libertarian Party nominated John Jay Myers as its Senate candidate, using approval voting on June 9 at the state convention in Fort Worth. The nominating process followed a two-round debate featuring six candidates for the nomination.

The Green Party of Texas reported two candidates pre-selected at the June 9 convention:^[87] David B. Collins and Victoria Ann Zabaras. Collins was ultimately nominated (official blog).

• 2012 United States Senate elections
• 2012 United States House of Representatives elections in Texas