78642 ZIP Code, Liberty Hill, TX
78642 is a ZIP code in Liberty Hill, Texas — mostly in Williamson County (92% of its land), with smaller parts in Burnet County. It covers 111 square miles of land, centered about 32 miles north of downtown Austin. The closest ZIP codes are 78605, 78641 and 78628. 26,434 people live here in 8,696 households. With about 238 people per square mile it is lightly settled, and most homes are owner-occupied (83%). Median household income is $132,958, well above the Texas median of $78,476; 50% of households have children under 18.
Quick facts
- Mailing city: Liberty Hill, TX
- County: Williamson County
- Metro area: Austin
- Land area: 111 sq mi
- Population: 26,434
- Median household income: $132,958
- Carrier routes: 16 (14,168 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 26,434 |
| Households | 8,696 |
| Median household income | $132,958 |
| Income per person | $51,464 |
| Median age | 36.9 |
| Homeowners | 82.9% |
| Median home value | $506,600 |
| Median rent | $1,658 |
| Bachelor's degree or higher | 44.5% |
| Average commute (minutes) | 35 |
| Households with kids under 18 | 50.0% |
| Moved in the past year | 13.8% |
| Below the poverty line | 3.3% |
| Broadband internet | 95.1% |
| Speak a non-English language at home | 21.2% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.0% |
| $10–15K | 0.8% |
| $15–25K | 1.6% |
| $25–35K | 2.6% |
| $35–50K | 5.9% |
| $50–75K | 10.4% |
| $75–100K | 14.1% |
| $100–150K | 19.1% |
| $150–200K | 18.3% |
| $200K+ | 25.3% |
Age
| % of all residents | Value |
|---|---|
| <10 | 14.8% |
| 10–19 | 16.7% |
| 20–24 | 3.6% |
| 25–34 | 12.6% |
| 35–44 | 18.0% |
| 45–54 | 13.4% |
| 55–64 | 10.1% |
| 65–74 | 7.8% |
| 75+ | 3.1% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 57.2% |
| Owned outright | 23.4% |
| Rented | 16.4% |
| Vacant | 3.0% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 80.6% |
| Townhome | 1.9% |
| 2–4 units | 4.1% |
| 5–19 units | 0.6% |
| 20+ units | 1.7% |
| Mobile / other | 11.2% |
Businesses in 78642
635 business establishments with 4,135 employees (ZIP Codes Business Patterns 2023).
- Construction: 155
- Professional, Scientific, and Technical Services: 80
- Retail Trade: 60
- Accommodation and Food Services: 53
- Other Services (except Public Administration): 53
- Real Estate and Rental and Leasing: 45
- Health Care and Social Assistance: 40
- Administrative and Support and Waste Management and Remediation Services: 34
EDDM carrier routes
78642 has 16 USPS carrier routes with 14,168 residential and 561 business mailboxes. Open the EDDM route map.
Carrier routes in 78642
78642 has 16 USPS carrier routes (16 rural (R)) with 14,168 residential and 561 business mailboxes. Routes range from 519 homes (R015) to 1,236 homes (R016); the median route has 901 homes. The Census counted 8,696 households in 78642 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 0 |
| 500–749 | 3 |
| 750–999 | 9 |
| 1,000–1,499 | 4 |
| 1,500+ | 0 |
Best routes in 78642 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route R007 — Est. median household income $170,660, 1,078 homes
- Route R008 — Est. median household income $166,752, 884 homes
- Route R016 — Est. median household income $161,348, 1,236 homes
- Route R013 — Est. median household income $147,727, 918 homes
- Route R005 — Est. median household income $143,793, 766 homes
Select these 5 routes on the route map
Often mailed by: Home services EDDM, Real estate EDDM postcards, Landscaping and lawn care mailers
Most families with kids
For tutoring, youth sports, pediatric dental, child care and family dining.
- Route R013 — Est. families with children under 18 71.4%, 918 homes
- Route R014 — Est. families with children under 18 64.4%, 968 homes
- Route R011 — Est. families with children under 18 54.6%, 1,075 homes
- Route R004 — Est. families with children under 18 46.1%, 1,124 homes
- Route R015 — Est. families with children under 18 45.4%, 519 homes
Select these 5 routes on the route map
Often mailed by: Dental practice EDDM, Healthcare and clinic mailers
Most homeowners
Owners decide on roofs, HVAC, lawns, solar and insurance; renters usually can't.
- Route R008 — Est. owner-occupied homes 97.9%, 884 homes
- Route R016 — Est. owner-occupied homes 97.1%, 1,236 homes
- Route R007 — Est. owner-occupied homes 92.8%, 1,078 homes
- Route R006 — Est. owner-occupied homes 91.6%, 718 homes
- Route R001 — Est. owner-occupied homes 90.8%, 751 homes
Select these 5 routes on the route map
Often mailed by: Roofing direct mail, HVAC postcards
Most new movers
New residents are still choosing a dentist, a gym and a lawn service.
- Route R008 — Est. residents who moved in the past year 28.5%, 884 homes
- Route R013 — Est. residents who moved in the past year 23.2%, 918 homes
- Route R016 — Est. residents who moved in the past year 22.9%, 1,236 homes
- Route R014 — Est. residents who moved in the past year 20.5%, 968 homes
- Route R005 — Est. residents who moved in the past year 15.9%, 766 homes
Select these 5 routes on the route map
Often mailed by: Restaurant EDDM menus and offers, Gym and fitness mailers
Newest homes
Newer subdivisions: landscaping, window treatments, fencing, security, home warranties.
- Route R008 — Est. homes built 2010 or later 98.0%, 884 homes
- Route R016 — Est. homes built 2010 or later 96.4%, 1,236 homes
- Route R013 — Est. homes built 2010 or later 93.5%, 918 homes
- Route R014 — Est. homes built 2010 or later 87.4%, 968 homes
- Route R011 — Est. homes built 2010 or later 82.3%, 1,075 homes
Select these 5 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R015 — USPS business mailboxes 254, 519 homes
- Route R014 — USPS business mailboxes 114, 968 homes
- Route R005 — USPS business mailboxes 46, 766 homes
- Route R017 — USPS business mailboxes 39, 981 homes
- Route R009 — USPS business mailboxes 37, 966 homes
Select these 5 routes on the route map
Every carrier route in 78642
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R001 | Rural | 751 | 1 | $90,502 | 90.8% | 39.1% | 2.8% |
| R002 | Rural | 547 | 9 | $136,138 | 84.8% | 39.3% | 12.1% |
| R003 | Rural | 768 | 24 | $119,060 | 87.9% | 40.5% | 5.4% |
| R004 | Rural | 1,124 | 3 | $102,714 | 61.7% | 46.1% | 12.8% |
| R005 | Rural | 766 | 46 | $143,793 | 81.7% | 45.1% | 15.9% |
| R006 | Rural | 718 | 0 | $111,462 | 91.6% | 40.1% | 3.6% |
| R007 | Rural | 1,078 | 9 | $170,660 | 92.8% | 41.9% | 14.2% |
| R008 | Rural | 884 | 2 | $166,752 | 97.9% | 43.4% | 28.5% |
| R009 | Rural | 966 | 37 | $97,077 | 79.1% | 42.5% | 10.6% |
| R010 | Rural | 869 | 21 | $105,123 | 87.2% | 33.6% | 7.1% |
| R011 | Rural | 1,075 | 0 | $139,543 | 77.8% | 54.6% | 14.6% |
| R013 | Rural | 918 | 1 | $147,727 | 82.4% | 71.4% | 23.2% |
| R014 | Rural | 968 | 114 | $142,284 | 78.9% | 64.4% | 20.5% |
| R015 | Rural | 519 | 254 | $130,995 | 83.6% | 45.4% | 9.6% |
| R016 | Rural | 1,236 | 1 | $161,348 | 97.1% | 45.0% | 22.9% |
| R017 | Rural | 981 | 39 | $136,413 | 77.9% | 43.2% | 13.4% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78642 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 78605 — Bertram city, TX (8.3 mi)
- 78641 — Leander city, TX (9.6 mi)
- 78628 — Georgetown city, TX (9.8 mi)
- 78633 — Georgetown city, TX (11.3 mi)
- 76527 — Florence city, TX (12.9 mi)
- 78613 — Cedar Park city, TX (14.9 mi)
- 78608 — Briggs CDP, TX (16.3 mi)
- 78681 — Round Rock city, TX (17 mi)
Areas that include 78642
- Liberty Hill, TX ZIP codes — 1 ZIP code
- Santa Rita Ranch, TX ZIP codes — 1 ZIP code
- Williamson County ZIP codes — 24 ZIP codes
- Austin ZIP code map — 89 ZIP codes
- Texas ZIP code data
Where it ranks
- No. 17 of 83: highest median household income in the Austin area
- No. 19 of 83: highest share of owner-occupied homes in the Austin area
- No. 4 of 83: highest share of households with children in the Austin area
- No. 2 of 81: fastest population growth in the Austin area
- No. 4 of 22: highest median household income in Williamson County
- No. 3 of 22: highest median home value in Williamson County
- No. 5 of 22: highest share of owner-occupied homes in Williamson County
- No. 1 of 22: highest share of households with children in Williamson County
- No. 2 of 21: fastest population growth in Williamson County
Mail every home in 78642
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 78642, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 78642 in?
- 78642 is a Liberty Hill, TX mailing address. By land area, 4% lies inside Liberty Hill and 4% lies inside Santa Rita Ranch; the rest is outside any Census-defined city or community.
- What county is 78642 in?
- 78642 is mostly in Williamson County (92% of its land), with smaller parts in Burnet County.
- What is the population of 78642?
- About 26,434 people (±1,503), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 20,385.
- What is the median household income in 78642?
- $132,958 (±$13,118), compared with $78,476 for Texas as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 78642?
- 16 USPS carrier routes with 14,168 residential and 561 business mailboxes (14,704 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 78642?
- The closest, measured center to center: 78605 (8.3 mi, Bertram), 78641 (9.6 mi, Leander), 78628 (9.8 mi, Georgetown), 78633 (11.3 mi, Georgetown), 76527 (12.9 mi, Florence) and 78613 (14.9 mi, Cedar Park).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.