The 2018 United States Senate election in Texas was held on November 6, 2018, along with other elections to the United States Senate and elections to the United States House of Representatives in additional states. Incumbent Republican U.S. Senator Ted Cruz won re-election to a second term defeating Democratic candidate Beto O'Rourke. The primary for all parties was held on March 6, 2018, making it the first primary of the 2018 season. As Cruz and O'Rourke both won majorities in their primaries, they did not participate in the May 22 runoff primary that was held for some nominations in Texas.

The 2018 United States House of Representatives elections were held on November 6, 2018, as part of the 2018 midterm elections during President Donald Trump's term, with early voting taking place in some states in the weeks preceding that date. Voters chose representatives from all 435 congressional districts across each of the 50 U.S. states to serve in the 116th United States Congress. Non-voting delegates from the District of Columbia and four of the five inhabited U.S. territories were also elected. On Election Day, Republicans had held a House majority since January 2011.