Overview
- District ID
- tx-hd-066
- State
- Texas
- Chamber
- Lower chamber
- District Code
- 066
- Land Area
- 139.9 sq mi
- Water Area
- 1.53 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Collin County | 139.78 sq mi | 99.9% | 16.6% |
Showing all 1 county
Places
Showing all 8 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| TX District 3 | 106,906 | 53.8% | 13.9% | 27.8% |
| TX District 4 | 91,812 | 46.2% | 12.0% | 72.2% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 143,585
- Active Voters
- 135,828 (94.6%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2023–2024 | 101,602 (70.8%) | 6,132 (4.3%) | 20,008 (13.9%) |
| 2021–2022 | 71,119 (49.5%) | 6,483 (4.5%) | 15,006 (10.5%) |
| 2019–2020 | 90,191 (62.8%) | 15,073 (10.5%) | 11,975 (8.3%) |
| 2017–2018 | 63,271 (44.1%) | 5,921 (4.1%) | 11,437 (8.0%) |
| 2015–2016 | 61,684 (43.0%) | 6,272 (4.4%) | 19,519 (13.6%) |
| 2013–2014 | 28,409 (19.8%) | 1,397 (1.0%) | 7,694 (5.4%) |
| 2011–2012 | 47,270 (32.9%) | 794 (0.6%) | 7,107 (4.9%) |
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
- 222,717 (± 4,145)
- Median Age
- 38.0
- Median Household Income
- $128,666 (± $4,461)
- High School Graduate or Higher (age 25+)
- 96.9%
- Bachelor's Degree or Higher (age 25+)
- 64.5%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 54,201 | 24.3% |
| 18 to 64 | 142,734 | 64.1% |
| 65 and over | 25,782 | 11.6% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 27,841 | 12.5% |
| White, not Hispanic | 116,814 | 52.4% |
| Black, not Hispanic | 21,125 | 9.5% |
| Asian, not Hispanic | 45,625 | 20.5% |
| American Indian / Alaska Native, not Hispanic | 245 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 20 | 0.0% |
| Some other race, not Hispanic | 1,714 | 0.8% |
| Two or more races, not Hispanic | 9,333 | 4.2% |
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
- 194,038
- Citizen Voting Age Population (CVAP)
- 143,530
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 170,832 | 88.0% |
| Hispanic | 23,209 | 12.0% |
| White | 116,199 | 59.9% |
| Black | 20,083 | 10.4% |
| Asian | 27,326 | 14.1% |
| American Indian / Alaska Native | 228 | 0.1% |
| Native Hawaiian / Pacific Islander | 57 | 0.0% |
| Two or More Races | 798 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 127,873 | 89.1% |
| Hispanic | 15,658 | 10.9% |
| White | 89,560 | 62.4% |
| Black | 16,973 | 11.8% |
| Asian | 19,647 | 13.7% |
| American Indian / Alaska Native | 1,108 | 0.8% |
| Native Hawaiian / Pacific Islander | 56 | 0.0% |
| Two or More Races | 625 | 0.4% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
