2020Final results
2020 election for Texas House District 31
Texas House of Representatives · Texas
Ryan Guillen (D) won with 58.4% of the vote, defeating Marian Knowlton (R) by 16.8 points.
Ryan GuillenDemocrat · winner · incumbent
58.4%32,212
Marian KnowltonRepublican
41.6%22,932
55,144 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET