78640 ZIP Code, Kyle, TX
78640 is a ZIP code in Kyle, Texas — mostly in Hays County (84% of its land), with smaller parts in Caldwell and Travis counties. It covers 90 square miles of land, centered about 19 miles south of downtown Austin. The closest ZIP codes are 78610, 78656 and 78652. 77,531 people live here in 27,375 households, more than in 9 of every 10 Texas ZIP codes. With about 866 people per square mile it is lightly settled, and most homes are owner-occupied (71%). Median household income is $90,075, above the Texas median of $78,476.
Quick facts
- Mailing city: Kyle, TX
- County: Hays County
- Metro area: Austin
- Land area: 90 sq mi
- Population: 77,531
- Median household income: $90,075
- Carrier routes: 34 (34,550 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 77,531 |
| Households | 27,375 |
| Median household income | $90,075 |
| Income per person | $36,864 |
| Median age | 33.4 |
| Homeowners | 71.0% |
| Median home value | $330,400 |
| Median rent | $1,730 |
| Bachelor's degree or higher | 29.3% |
| Average commute (minutes) | 38 |
| Households with kids under 18 | 39.8% |
| Moved in the past year | 14.0% |
| Below the poverty line | 10.2% |
| Broadband internet | 96.3% |
| Speak a non-English language at home | 36.6% |
Household income
| % of households | Value |
|---|---|
| <$10K | 4.7% |
| $10–15K | 0.6% |
| $15–25K | 3.1% |
| $25–35K | 6.4% |
| $35–50K | 9.7% |
| $50–75K | 13.3% |
| $75–100K | 19.4% |
| $100–150K | 23.6% |
| $150–200K | 10.6% |
| $200K+ | 8.6% |
Age
| % of all residents | Value |
|---|---|
| <10 | 14.1% |
| 10–19 | 14.7% |
| 20–24 | 8.1% |
| 25–34 | 16.1% |
| 35–44 | 16.5% |
| 45–54 | 12.6% |
| 55–64 | 10.3% |
| 65–74 | 5.1% |
| 75+ | 2.3% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 51.7% |
| Owned outright | 17.6% |
| Rented | 28.1% |
| Vacant | 2.7% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 70.5% |
| Townhome | 1.7% |
| 2–4 units | 0.2% |
| 5–19 units | 6.5% |
| 20+ units | 8.2% |
| Mobile / other | 12.8% |
Businesses in 78640
1,025 business establishments with 13,484 employees (ZIP Codes Business Patterns 2023).
- Construction: 174
- Health Care and Social Assistance: 139
- Retail Trade: 113
- Accommodation and Food Services: 107
- Other Services (except Public Administration): 103
- Professional, Scientific, and Technical Services: 91
- Real Estate and Rental and Leasing: 65
- Administrative and Support and Waste Management and Remediation Services: 60
EDDM carrier routes
78640 has 34 USPS carrier routes with 34,550 residential and 982 business mailboxes. Open the EDDM route map.
Carrier routes in 78640
78640 has 34 USPS carrier routes (34 rural (R)) with 34,550 residential and 982 business mailboxes. Routes range from 648 homes (R004) to 1,766 homes (R023); the median route has 978 homes. The Census counted 27,375 households in 78640 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 0 |
| 500–749 | 4 |
| 750–999 | 14 |
| 1,000–1,499 | 15 |
| 1,500+ | 1 |
Best routes in 78640 for…
Highest income
For bigger-ticket offers: remodeling, pools, financial planning, private schools.
- Route R003 — Est. median household income $141,612, 753 homes
- Route R017 — Est. median household income $117,081, 930 homes
- Route R011 — Est. median household income $115,896, 828 homes
- Route R027 — Est. median household income $113,869, 1,024 homes
- Route R014 — Est. median household income $112,359, 980 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 R015 — Est. families with children under 18 56.7%, 964 homes
- Route R007 — Est. families with children under 18 54.9%, 794 homes
- Route R018 — Est. families with children under 18 53.5%, 1,171 homes
- Route R021 — Est. families with children under 18 51.4%, 1,243 homes
- Route R019 — Est. families with children under 18 50.8%, 1,480 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 R003 — Est. owner-occupied homes 96.0%, 753 homes
- Route R007 — Est. owner-occupied homes 95.1%, 794 homes
- Route R027 — Est. owner-occupied homes 90.1%, 1,024 homes
- Route R026 — Est. owner-occupied homes 88.6%, 975 homes
- Route R011 — Est. owner-occupied homes 88.0%, 828 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 R002 — Est. residents who moved in the past year 25.0%, 717 homes
- Route R028 — Est. residents who moved in the past year 23.6%, 1,262 homes
- Route R032 — Est. residents who moved in the past year 20.2%, 898 homes
- Route R010 — Est. residents who moved in the past year 18.2%, 769 homes
- Route R020 — Est. residents who moved in the past year 18.1%, 1,066 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 R027 — Est. homes built 2010 or later 71.4%, 1,024 homes
- Route R021 — Est. homes built 2010 or later 63.1%, 1,243 homes
- Route R012 — Est. homes built 2010 or later 60.9%, 824 homes
- Route R025 — Est. homes built 2010 or later 59.5%, 1,043 homes
- Route R019 — Est. homes built 2010 or later 58.5%, 1,480 homes
Select these 5 routes on the route map
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R032 — USPS business mailboxes 161, 898 homes
- Route R014 — USPS business mailboxes 122, 980 homes
- Route R010 — USPS business mailboxes 103, 769 homes
- Route R028 — USPS business mailboxes 83, 1,262 homes
- Route R023 — USPS business mailboxes 79, 1,766 homes
Select these 5 routes on the route map
Every carrier route in 78640
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R001 | Rural | 823 | 38 | $87,433 | 83.2% | 41.7% | 12.6% |
| R002 | Rural | 717 | 22 | $101,239 | 85.4% | 40.5% | 25.0% |
| R003 | Rural | 753 | 10 | $141,612 | 96.0% | 33.0% | 13.9% |
| R004 | Rural | 648 | 64 | $78,625 | 76.6% | 48.4% | 10.0% |
| R005 | Rural | 764 | 5 | $85,716 | 49.0% | 42.5% | 15.2% |
| R006 | Rural | 941 | 4 | $57,221 | 40.5% | 26.5% | 17.4% |
| R007 | Rural | 794 | 5 | $66,630 | 95.1% | 54.9% | 9.1% |
| R008 | Rural | 1,049 | 2 | $84,522 | 81.1% | 46.6% | 10.6% |
| R009 | Rural | 749 | 20 | $98,975 | 82.9% | 37.8% | 9.2% |
| R010 | Rural | 769 | 103 | $82,703 | 62.3% | 28.1% | 18.2% |
| R011 | Rural | 828 | 4 | $115,896 | 88.0% | 47.1% | 17.2% |
| R012 | Rural | 824 | 0 | $96,301 | 84.5% | 34.2% | 17.4% |
| R013 | Rural | 970 | 0 | $93,730 | 60.1% | 41.3% | 15.2% |
| R014 | Rural | 980 | 122 | $112,359 | 80.8% | 41.7% | 11.0% |
| R015 | Rural | 964 | 40 | $105,249 | 86.6% | 56.7% | 8.7% |
| R016 | Rural | 694 | 70 | $98,361 | 78.6% | 31.5% | 7.2% |
| R017 | Rural | 930 | 0 | $117,081 | 87.5% | 44.2% | 14.0% |
| R018 | Rural | 1,171 | 0 | $100,034 | 86.2% | 53.5% | 8.9% |
| R019 | Rural | 1,480 | 16 | $77,755 | 56.0% | 50.8% | 12.4% |
| R020 | Rural | 1,066 | 1 | $101,173 | 87.0% | 35.6% | 18.1% |
| R021 | Rural | 1,243 | 0 | $92,827 | 84.9% | 51.4% | 16.0% |
| R022 | Rural | 1,269 | 7 | $90,948 | 73.3% | 40.9% | 5.3% |
| R023 | Rural | 1,766 | 79 | $82,109 | 56.8% | 30.1% | 17.8% |
| R024 | Rural | 1,129 | 6 | $107,510 | 77.0% | 36.7% | 14.7% |
| R025 | Rural | 1,043 | 0 | $92,822 | 84.0% | 39.1% | 12.9% |
| R026 | Rural | 975 | 13 | $89,754 | 88.6% | 43.6% | 13.9% |
| R027 | Rural | 1,024 | 6 | $113,869 | 90.1% | 35.3% | 17.8% |
| R028 | Rural | 1,262 | 83 | $71,577 | 50.3% | 28.7% | 23.6% |
| R029 | Rural | 1,139 | 1 | $95,290 | 84.1% | 41.1% | 13.9% |
| R030 | Rural | 1,355 | 3 | $90,693 | 66.6% | 30.0% | 10.9% |
| R031 | Rural | 1,154 | 13 | $97,502 | 78.5% | 41.0% | 16.6% |
| R032 | Rural | 898 | 161 | $75,106 | 57.2% | 28.4% | 20.2% |
| R033 | Rural | 1,073 | 43 | $89,656 | 66.3% | 38.1% | 14.2% |
| R034 | Rural | 1,306 | 41 | $97,087 | 82.9% | 41.0% | 14.0% |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 78640 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
- 78610 — Buda city, TX (6 mi)
- 78656 — San Marcos city, TX (6.3 mi)
- 78652 — Austin city, TX (9.9 mi)
- 78747 — Austin city, TX (10.2 mi)
- 78748 — Austin city, TX (11.4 mi)
- 78644 — Lockhart city, TX (12.2 mi)
- 78655 — Martindale city, TX (12.4 mi)
- 78666 — San Marcos city, TX (12.5 mi)
Areas that include 78640
- Kyle, TX ZIP codes — 2 ZIP codes
- Uhland, TX ZIP codes — 1 ZIP code
- Niederwald, TX ZIP codes — 1 ZIP code
- Mountain City, TX ZIP codes — 2 ZIP codes
- Creedmoor, TX ZIP codes — 3 ZIP codes
- Caldwell County ZIP codes — 11 ZIP codes
- Hays County ZIP codes — 8 ZIP codes
- Austin ZIP code map — 89 ZIP codes
- Texas ZIP code data
Where it ranks
- No. 20 of 83: highest share of households with children in the Austin area
- No. 15 of 83: lowest median age in the Austin area
- No. 17 of 81: fastest population growth in the Austin area
- No. 3 of 8: highest share of households with children in Hays County
- No. 4 of 8: highest share of residents who moved in during the past year in Hays County
- No. 2 of 8: lowest median age in Hays County
- No. 3 of 8: fastest population growth in Hays County
Mail every home in 78640
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) 78640, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 78640 in?
- 78640 is a Kyle, TX mailing address. By land area, 25% lies inside Kyle, 4% lies inside Niederwald and 3% lies inside Uhland; the rest is outside any Census-defined city or community.
- What county is 78640 in?
- 78640 is mostly in Hays County (84% of its land), with smaller parts in Caldwell and Travis counties.
- What is the population of 78640?
- About 77,531 people (±2,071), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 64,539.
- What is the median household income in 78640?
- $90,075 (±$2,844), 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 78640?
- 34 USPS carrier routes with 34,550 residential and 982 business mailboxes (35,535 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 78640?
- The closest, measured center to center: 78610 (6 mi, Buda), 78656 (6.3 mi, San Marcos), 78652 (9.9 mi, Austin), 78747 (10.2 mi, Austin), 78748 (11.4 mi, Austin) and 78644 (12.2 mi, Lockhart).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.