78634 ZIP Code, Hutto, TX
78634 is a ZIP code in Hutto, Texas in Williamson County. It covers 56 square miles of land, centered about 23 miles northeast of downtown Austin. The closest ZIP codes are 78665, 78664 and 78626. 46,413 people live here in 15,808 households, more than in 9 of every 10 Texas ZIP codes. With about 823 people per square mile it is lightly settled, and most homes are owner-occupied (79%). Median household income is $114,426, above the Texas median of $78,476; 45% of households have children under 18.
Quick facts
- Mailing city: Hutto, TX
- County: Williamson County
- Metro area: Austin
- Land area: 56 sq mi
- Population: 46,413
- Median household income: $114,426
- Carrier routes: 21 (21,724 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 46,413 |
| Households | 15,808 |
| Median household income | $114,426 |
| Income per person | $44,705 |
| Median age | 34.9 |
| Homeowners | 78.6% |
| Median home value | $375,200 |
| Median rent | $2,020 |
| Bachelor's degree or higher | 36.9% |
| Average commute (minutes) | 29.1 |
| Households with kids under 18 | 44.9% |
| Moved in the past year | 13.5% |
| Below the poverty line | 5.7% |
| Broadband internet | 96.5% |
| Speak a non-English language at home | 27.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 1.3% |
| $10–15K | 1.2% |
| $15–25K | 1.7% |
| $25–35K | 1.3% |
| $35–50K | 5.1% |
| $50–75K | 14.1% |
| $75–100K | 14.5% |
| $100–150K | 28.6% |
| $150–200K | 18.3% |
| $200K+ | 13.9% |
Age
| % of all residents | Value |
|---|---|
| <10 | 13.6% |
| 10–19 | 15.0% |
| 20–24 | 6.0% |
| 25–34 | 15.7% |
| 35–44 | 18.5% |
| 45–54 | 13.9% |
| 55–64 | 9.9% |
| 65–74 | 5.7% |
| 75+ | 1.8% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 62.8% |
| Owned outright | 13.4% |
| Rented | 20.5% |
| Vacant | 3.2% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 86.5% |
| Townhome | 1.5% |
| 2–4 units | 0.2% |
| 5–19 units | 2.5% |
| 20+ units | 6.2% |
| Mobile / other | 3.1% |
Businesses in 78634
744 business establishments with 8,450 employees (ZIP Codes Business Patterns 2023).
- Construction: 161
- Other Services (except Public Administration): 88
- Retail Trade: 71
- Professional, Scientific, and Technical Services: 71
- Accommodation and Food Services: 60
- Health Care and Social Assistance: 54
- Administrative and Support and Waste Management and Remediation Services: 44
- Transportation and Warehousing: 43
EDDM carrier routes
78634 has 21 USPS carrier routes with 21,724 residential and 932 business mailboxes. Open the EDDM route map.
Carrier routes in 78634
78634 has 21 USPS carrier routes (21 rural (R)) with 21,724 residential and 932 business mailboxes. Routes range from 565 homes (R021) to 1,420 homes (R020); the median route has 1,003 homes. The Census counted 15,808 households in 78634 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 0 |
| 500–749 | 1 |
| 750–999 | 9 |
| 1,000–1,499 | 11 |
| 1,500+ | 0 |
Best routes in 78634 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route R016 — Est. median household income $153,607, 896 homes
- Route R002 — Est. median household income $147,024, 1,065 homes
- Route R010 — Est. median household income $144,411, 999 homes
- Route R019 — Est. median household income $143,376, 1,219 homes
- Route R009 — Est. median household income $143,083, 1,329 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 R022 — Est. families with children under 18 69.4%, 826 homes
- Route R017 — Est. families with children under 18 59.0%, 984 homes
- Route R009 — Est. families with children under 18 56.8%, 1,329 homes
- Route R002 — Est. families with children under 18 55.6%, 1,065 homes
- Route R021 — Est. families with children under 18 54.6%, 565 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 R004 — Est. owner-occupied homes 94.6%, 1,251 homes
- Route R017 — Est. owner-occupied homes 93.6%, 984 homes
- Route R005 — Est. owner-occupied homes 92.7%, 942 homes
- Route R007 — Est. owner-occupied homes 88.9%, 881 homes
- Route R016 — Est. owner-occupied homes 86.2%, 896 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 R006 — Est. residents who moved in the past year 24.3%, 1,171 homes
- Route R004 — Est. residents who moved in the past year 23.8%, 1,251 homes
- Route R008 — Est. residents who moved in the past year 23.1%, 928 homes
- Route R018 — Est. residents who moved in the past year 22.6%, 1,217 homes
- Route R005 — Est. residents who moved in the past year 21.5%, 942 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 R004 — Est. homes built 2010 or later 73.8%, 1,251 homes
- Route R014 — Est. homes built 2010 or later 71.0%, 1,017 homes
- Route R010 — Est. homes built 2010 or later 69.4%, 999 homes
- Route R019 — Est. homes built 2010 or later 69.2%, 1,219 homes
- Route R005 — Est. homes built 2010 or later 69.2%, 942 homes
Select these 5 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R021 — USPS business mailboxes 436, 565 homes
- Route R002 — USPS business mailboxes 201, 1,065 homes
- Route R015 — USPS business mailboxes 84, 1,003 homes
- Route R001 — USPS business mailboxes 63, 845 homes
- Route R014 — USPS business mailboxes 38, 1,017 homes
Select these 5 routes on the route map
Every carrier route in 78634
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R001 | Rural | 845 | 63 | $102,991 | 85.4% | 48.2% | 10.9% |
| R002 | Rural | 1,065 | 201 | $147,024 | 80.4% | 55.6% | 7.4% |
| R003 | Rural | 1,084 | 7 | $123,445 | 80.3% | 47.3% | 8.1% |
| R004 | Rural | 1,251 | 0 | $115,822 | 94.6% | 40.4% | 23.8% |
| R005 | Rural | 942 | 19 | $117,884 | 92.7% | 44.2% | 21.5% |
| R006 | Rural | 1,171 | 1 | $93,686 | 57.3% | 31.2% | 24.3% |
| R007 | Rural | 881 | 1 | $117,118 | 88.9% | 53.6% | 12.4% |
| R008 | Rural | 928 | 20 | $110,901 | 77.7% | 52.4% | 23.1% |
| R009 | Rural | 1,329 | 27 | $143,083 | 80.6% | 56.8% | 13.1% |
| R010 | Rural | 999 | 1 | $144,411 | 85.9% | 48.5% | 9.2% |
| R011 | Rural | 1,156 | 0 | $118,194 | 82.2% | 45.1% | 10.8% |
| R012 | Rural | 926 | 1 | $119,925 | 83.6% | 53.4% | 11.4% |
| R014 | Rural | 1,017 | 38 | $123,835 | 65.4% | 31.1% | 13.3% |
| R015 | Rural | 1,003 | 84 | $102,549 | 47.8% | 24.5% | 13.3% |
| R016 | Rural | 896 | 2 | $153,607 | 86.2% | 49.0% | 9.0% |
| R017 | Rural | 984 | 0 | $126,839 | 93.6% | 59.0% | 5.2% |
| R018 | Rural | 1,217 | 5 | $118,553 | 64.9% | 46.7% | 22.6% |
| R019 | Rural | 1,219 | 4 | $143,376 | 85.6% | 48.3% | 9.3% |
| R020 | Rural | 1,420 | 20 | $114,474 | 66.2% | 34.1% | 17.2% |
| R021 | Rural | 565 | 436 | $133,251 | 76.7% | 54.6% | 12.2% |
| R022 | Rural | 826 | 2 | $116,245 | 79.7% | 69.4% | 7.7% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78634 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
- 78665 — Round Rock city, TX (5.5 mi)
- 78664 — Round Rock city, TX (7.2 mi)
- 78626 — Georgetown city, TX (8.1 mi)
- 78674 — Weir city, TX (8.3 mi)
- 78660 — Pflugerville city, TX (8.8 mi)
- 76574 — Taylor city, TX (9.3 mi)
- 78681 — Round Rock city, TX (10.3 mi)
- 78615 — Coupland city, TX (11.2 mi)
Areas that include 78634
- Hutto, 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. 6 of 83: highest share of households with children in the Austin area
- No. 24 of 83: lowest median age in the Austin area
- No. 16 of 81: fastest population growth in the Austin area
- No. 2 of 22: highest share of households with children in Williamson County
- No. 5 of 22: lowest median age in Williamson County
Mail every home in 78634
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) 78634, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 78634 in?
- 78634 is a Hutto, TX mailing address. By land area, 22% lies inside Hutto; the rest is outside any Census-defined city or community.
- What county is 78634 in?
- 78634 is in Williamson County.
- What is the population of 78634?
- About 46,413 people (±1,401), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 37,951.
- What is the median household income in 78634?
- $114,426 (±$6,370), 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 78634?
- 21 USPS carrier routes with 21,724 residential and 932 business mailboxes (22,656 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 78634?
- The closest, measured center to center: 78665 (5.5 mi, Round Rock), 78664 (7.2 mi, Round Rock), 78626 (8.1 mi, Georgetown), 78674 (8.3 mi, Weir), 78660 (8.8 mi, Pflugerville) and 76574 (9.3 mi, Taylor).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.