Incumbent Julie Johnson (D) and Colin Allred (D) are running in the Democratic primary runoff for Texas' 33rd Congressional District on May 26, 2026. Allred and Johnson were the top two finishers in the March 3 primary, with 45.5% and 34.0% of the vote, respectively. They advanced to a runoff because neither received more than 50% of the vote.

Allred was first elected to represent an earlier version of the district in 2018. In 2024, Allred ran for U.S. Senate rather than seeking re-election and Johnson was elected to the U.S. House. Allred ran for U.S. Senate in 2026 before dropping out of that race and re-filing for the 33rd District.

The Texas Tribune's Gabby Birenbaum said the primary "takes on additional novelty given that the two candidates are vying for a new district that includes unfamiliar turf for both," as Texas' redistricting ahead of the 2026 elections changed district lines. Birenbaum said the "new boundaries contain about a third of the residents from the old 32nd District that both Allred and Johnson have represented."

Before her election to Congress, Johnson served six years in the Texas House of Representatives and worked as a litigation attorney in private practice. Johnson says she is running "to fight for the people who are too often overlooked and to make sure North Texans are not an afterthought." In a statement after the primary, Johnson said, "Some people thought this race would be decided outright [in the primary]. Instead, we forced a runoff with a candidate with statewide name recognition and a significant financial advantage. That says something important; Voters are looking closely, and they’re making up their own minds about our records."

Allred has worked as a professional athlete, civil rights attorney, and staff member at the U.S. Department of Housing and Urban Development under President Barack Obama (D). Allred says he is running "to fight for Texans who work hard and play by the rules but never feel like they can win." In a statement after the primary, Allred said, "At a time when Donald Trump and his allies are attacking our rights and our democracy, the people of this district deserve a representative who will fight for them, not one who profits off Palantir, the company ICE uses for surveillance to track and detain immigrant families and American citizens."

As of March 2026, The Cook Political Report with Amy Walter, Inside Elections with Nathan Gonzales, and Larry Sabato's Crystal Ball each rated the general election Safe/Solid Democratic.