Residential delivery area · Texas
ZIP Code 78642: Liberty Hill, TX
ZIP code 78642 uses the postal name Liberty Hill, Texas and lies mostly in Williamson County (92% of its land) with the rest in Burnet County (Census 2020 ZIP-county file). About 26,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $132,958 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Liberty Hill (4%) and Santa Rita Ranch (4%); 93% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Liberty Hill · its only residential ZIP
- County
- Williamson County (92%); Burnet County (8%)
- Census places
- Liberty Hill (4%); Santa Rita Ranch (4%) census-designated place
- Metro area
- Austin-Round Rock-San Marcos, TX
- House district
- TX-31 119th Congress
- State
- Texas
- Time zone
- Central
- Land area
- 111.1 sq mi · 238 people per sq mi
Where is ZIP code 78642?
78642 centers on 30.696°, -97.940° and covers 111.1 square miles of land plus 0.6 of water. It borders 5 ZIP codes: 78605, 78641, 78628, 78633, 76527.
The map draws ZIP code areas only. For the streets inside 78642, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 78642 compare with the rest of Williamson County?
| Measure | 78642 | In Williamson County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 26,434 | 17th of 27 | 462nd of 1,990 |
| Median household income | $133k | 4th of 22 | 71st of 1,172 |
| Median home value | $507k | 5th of 24 | 99th of 1,172 |
Its median household income is higher than in 94% of U.S. residential ZIP codes, and it is denser than 64% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 78642?
The 2020 Census counted 20,385 people in 78642; the ACS, which samples households over 2020-2024, estimates 26,434. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 26,434
- 2020 Census count
- 20,385
- Households
- 8,696
- Median age
- 36.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 78642?
Of the 26,434 people the ACS estimates in 78642, 29.9% are under 18 and 11.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (62.1%), then Hispanic or Latino (28.2%).
- Under 1829.9%
- 18 to 6459.1%
- 65 and older11.0%
- White, not Hispanic62.1%
- Hispanic or Latino28.2%
- Asian, not Hispanic4.6%
- Other or two or more3.4%
- Black, not Hispanic1.6%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 78642 earn?
Median household income is $132,958 (ACS 2020-2024), the 4th highest of the 22 ranked ZIP codes in Williamson County.
- Median household income
- $132,958
- Income per person
- $51,464
- Below the poverty line
- 3.3%
- Unemployed (of the labor force)
- 4.6%
- Adults 25+ with a bachelor's degree
- 44.5%
- Adjusted gross income per tax return, 2022
- $138,21913,250 returns; wages 74% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 78642?
FHFA's house price index for 78642, built from repeat sales and appraisals of the same homes, rose 108% from 2015 to 2025 and rose 55% from 2020 to 2025, and moved +0.8% in 2025.
- Median home value (owners' estimate)
- $506,600
- Median gross rent
- $1,658
- Homes owned by their occupants
- 82.9%
- Housing units
- 8,963
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 78642?
635 business establishments had a location in this ZIP code in 2023, 296 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction155
- Professional, scientific, and technical services80
- Retail trade60
- Accommodation and food services53
- Other services (except public administration)53
- Real estate and rental and leasing45
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 78642?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78605 | Bertram | 7,573 | $84k | 8.3 mi |
| 78641 | Leander | 99,865 | $135k | 9.6 mi |
| 78628 | Georgetown | 50,822 | $126k | 9.8 mi |
| 78633 | Georgetown | 29,309 | $101k | 11.3 mi |
| 76527 | Florence | 4,918 | $82k | 12.9 mi |
| 78613 | Cedar Park | 89,956 | $126k | 14.9 mi (near) |
| 78608 | Briggs | 428 | – | 16.3 mi (near) |
| 78681 | Round Rock | 56,691 | $138k | 17.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.