New Texas congressional district lines reshape key Houston-area seats ahead of the March 3, 2026 primaries
Houston voters face new congressional boundaries in 2026 election cycle
Thousands of Houston-area voters are preparing to cast ballots under newly redrawn congressional district lines that have reshaped several seats in and around Harris County ahead of the March 3, 2026 primary election. The boundary changes alter which communities vote together, which candidates appear on local ballots, and the demographic and partisan composition of multiple districts.
Early in-person voting for the March 3 primary began on February 17 and runs through February 27. Texans who vote in person must present an approved form of identification. Texas law also prohibits the use of wireless communication devices, including cell phones, inside the voting room.
Three neighboring districts in the Houston region have been significantly reconfigured
The most visible changes in the Houston area involve Congressional Districts 9, 18 and 29, which sit alongside one another and now have substantially different shapes and voter makeups than in prior cycles. The remap shifts parts of southwest and south Houston, the city’s east and north corridors, and portions of eastern Harris County into new alignments that will be tested immediately in the 2026 primaries.
District 9 has been reoriented away from its previous base in southwest Houston and now takes in parts of eastern Harris County and extends into Liberty County. The district is being contested as an open seat in the 2026 cycle because the longtime incumbent is running in a different district created by the new lines.
District 18, long associated with central Houston and historically Black political power, has also been redrawn and is now the site of a high-profile Democratic primary shaped by the new electorate. The district is scheduled for a March 3 primary after a separate special election cycle filled a vacancy for the remainder of the current term.
District 29, long considered a heavily Latino seat anchored in east and north Houston, has shifted to a more multiracial electorate. Under the new boundaries, the district no longer has a Hispanic-majority eligible voting population, bringing more Black voters into the district while moving some heavily Latino areas into neighboring seats.
Candidate matchups and voter familiarity are changing at the same time
The remap is already affecting campaigns, including by placing prominent Democrats into new political terrain and reshaping who can credibly compete. In District 18, the new electorate includes a large share of voters who previously voted in District 9, altering the base of support candidates can expect. In District 29, only a portion of prior constituents remain in the seat, requiring campaigns to reach many voters who are seeing a sitting member of Congress on their ballot for the first time.
For many voters, the most immediate consequence of redistricting is practical: a different district number, different candidates, and different coalitions deciding who represents their community in Washington.
What Houston-area voters can do now
Voters can confirm their district assignment and polling place through county election information and should review sample ballots in advance, particularly in neighborhoods where boundaries shifted. With early voting underway through February 27 and Election Day set for March 3, the new map’s impact will be measured first in turnout patterns and primary results across the reconfigured Houston-area seats.