Texas Congressional District 31

Voters

Registered Voters: 550,551
Active Voters: 504,405 (91.6%)

Party Registration

This state's voter file does not record party registration.

Turnout by Cycle

Cycle	General	Democratic Primary	Republican Primary
2023–2024	353,655 (64.2%)	23,256 (4.2%)	84,630 (15.4%)
2021–2022	246,561 (44.8%)	23,429 (4.3%)	68,173 (12.4%)
2019–2020	310,464 (56.4%)	48,062 (8.7%)	63,095 (11.5%)
2017–2018	214,942 (39.0%)	19,123 (3.5%)	49,319 (9.0%)
2015–2016	214,009 (38.9%)	24,349 (4.4%)	80,644 (14.6%)
2013–2014	107,063 (19.4%)	6,080 (1.1%)	34,480 (6.3%)
2011–2012	168,372 (30.6%)	5,193 (0.9%)	38,808 (7.0%)

Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.

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Source: Civitech voter file snapshot as of 08/14/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Citizen Population: 790,414
Citizen Voting Age Population (CVAP): 589,030

Citizen Population by Race/Ethnicity

Group	Citizens	Share
Non-Hispanic	611,993	77.4%
Hispanic	178,417	22.6%
White	484,004	61.2%
Black	59,417	7.5%
Asian	32,342	4.1%
American Indian / Alaska Native	1,053	0.1%
Native Hawaiian / Pacific Islander	1,771	0.2%
Two or More Races	5,628	0.7%

Citizen Voting Age Population by Race/Ethnicity

Group	CVAP	Share
Non-Hispanic	474,129	80.5%
Hispanic	114,902	19.5%
White	385,551	65.5%
Black	51,342	8.7%
Asian	25,633	4.4%
American Indian / Alaska Native	7,472	1.3%
Native Hawaiian / Pacific Islander	1,365	0.2%
Two or More Races	3,346	0.6%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation.