Texas State Senate District 18

State Legislative District Profile (Upper Chamber)

Overview

District ID
tx-sd-018
State
Texas
Chamber
Upper chamber (state senate)
District Code
018
Land Area
11,413 sq mi
Water Area
956.6 sq mi

Boundary

Boundary of Texas State Senate District 18

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Gonzales County1066.69 sq mi9.3%100.0%
Lavaca County969.71 sq mi8.5%100.0%
Fayette County949.93 sq mi8.3%100.0%
DeWitt County908.98 sq mi8.0%100.0%
Victoria County882.11 sq mi7.7%100.0%
Goliad County852.01 sq mi7.5%100.0%
Grimes County787.47 sq mi6.9%100.0%
Refugio County770.48 sq mi6.8%100.0%
Burleson County659.08 sq mi5.8%100.0%
Austin County646.50 sq mi5.7%100.0%
Lee County629.04 sq mi5.5%100.0%
Washington County604.19 sq mi5.3%100.0%
Calhoun County506.94 sq mi4.4%100.0%
Waller County359.08 sq mi3.1%70.0%
Fort Bend County286.56 sq mi2.5%33.3%
Aransas County252.07 sq mi2.2%100.0%
Montgomery County162.08 sq mi1.4%15.6%
Harris County119.52 sq mi1.0%7.0%

Showing all 18 counties

Places

PlaceOverlapShare of district landShare of place land
Inez CDP59.59 sq mi0.5%100.0%
Victoria city37.37 sq mi0.3%100.0%
Rosenberg city34.10 sq mi0.3%90.6%
Sugar Land city19.99 sq mi0.2%49.4%
Rockport city16.55 sq mi0.1%100.0%
Brenham city12.98 sq mi0.1%99.4%
Sealy city11.57 sq mi0.1%98.7%
Port Lavaca city10.15 sq mi0.1%100.0%
Pine Island town9.34 sq mi0.1%100.0%
Houston city8.40 sq mi0.1%1.3%
San Felipe town8.36 sq mi0.1%100.0%
Pecan Grove CDP8.31 sq mi0.1%100.0%
Navasota city7.98 sq mi0.1%95.6%
Prairie View city7.35 sq mi0.1%99.2%
Cuero city6.56 sq mi0.1%100.0%
Hempstead city6.55 sq mi0.1%99.8%
Gonzales city6.08 sq mi0.1%100.0%
Pinehurst CDP5.67 sq mi<0.1%71.7%
New Ulm CDP5.36 sq mi<0.1%100.0%
Giddings city5.28 sq mi<0.1%100.0%
Richmond city4.91 sq mi<0.1%100.0%
Mission Bend CDP4.65 sq mi<0.1%97.6%
Yoakum city4.58 sq mi<0.1%100.0%
Clay CDP4.45 sq mi<0.1%100.0%
Brookshire city4.33 sq mi<0.1%100.0%

Showing top 25 of 94 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
TX District 7230,16824.4%30.0%0.6%
TX District 27208,82222.1%27.2%54.4%
TX District 10196,36520.8%25.6%40.6%
TX District 22168,51717.8%22.0%2.0%
TX District 8141,20814.9%18.4%2.4%
TX District 38100<0.1%<0.1%<0.1%

Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).

Voters

Registered Voters
652,168
Active Voters
622,548 (95.5%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2023–2024423,821 (65.0%)31,520 (4.8%)105,276 (16.1%)
2021–2022289,914 (44.5%)29,157 (4.5%)88,871 (13.6%)
2019–2020393,148 (60.3%)53,221 (8.2%)88,535 (13.6%)
2017–2018276,406 (42.4%)22,221 (3.4%)62,894 (9.6%)
2015–2016287,846 (44.1%)30,967 (4.7%)99,448 (15.2%)
2013–2014141,989 (21.8%)9,266 (1.4%)46,923 (7.2%)
2011–2012231,544 (35.5%)12,057 (1.8%)49,937 (7.7%)

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.

Browse the voter list for this district (premium access; sign-in required)

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 Population
1,018,458 (± 9,193)
Median Age
37.1
Median Household Income
$86,737 (± $1,686)
High School Graduate or Higher (age 25+)
88.5%
Bachelor's Degree or Higher (age 25+)
35.0%

Population by Age

GroupPeopleShare
Under 18256,70525.2%
18 to 64607,53759.7%
65 and over154,21615.1%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)312,07830.6%
White, not Hispanic388,74738.2%
Black, not Hispanic154,77015.2%
Asian, not Hispanic123,88512.2%
American Indian / Alaska Native, not Hispanic1,3550.1%
Native Hawaiian / Pacific Islander, not Hispanic6370.1%
Some other race, not Hispanic4,6820.5%
Two or more races, not Hispanic32,3043.2%

Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.

Citizen Voting Age Population

Total Citizen Population
927,371
Citizen Voting Age Population (CVAP)
681,676

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic660,40171.2%
Hispanic266,97328.8%
White390,13342.1%
Black142,59715.4%
Asian100,43810.8%
American Indian / Alaska Native1,6360.2%
Native Hawaiian / Pacific Islander6350.1%
Two or More Races3,8820.4%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic506,76274.3%
Hispanic174,91325.7%
White314,07046.1%
Black108,33215.9%
Asian75,65811.1%
American Indian / Alaska Native7,2951.1%
Native Hawaiian / Pacific Islander3630.1%
Two or More Races1,9080.3%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).