Residential delivery area · Texas
ZIP Code 78640: Kyle, TX
ZIP code 78640 uses the postal name Kyle, Texas and lies mostly in Hays County (84% of its land), reaching into Caldwell County and Travis County (Census 2020 ZIP-county file). About 78,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $90,075 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Kyle (25%), Niederwald (4%) and Uhland (3%), and 1% in smaller places; 67% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Kyle · its only residential ZIP
- County
- Hays County (84%); Caldwell County (15%); Travis County (1%)
- Census places
- Kyle (25%); Niederwald (4%); Uhland (3%)
- Metro area
- Austin-Round Rock-San Marcos, TX
- House districts
- TX-35 (64%), TX-21 (21%), TX-27 (15%) 119th Congress, by share of land
- State
- Texas
- Time zone
- Central
- Land area
- 89.6 sq mi · 866 people per sq mi
Where is ZIP code 78640?
78640 centers on 29.995°, -97.821° and covers 89.6 square miles of land plus 0.7 of water. It borders 6 ZIP codes: 78610, 78656, 78644, 78666, 78619, 78676.
The map draws ZIP code areas only. For the streets inside 78640, 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 78640 compare with the rest of Hays County?
| Measure | 78640 | In Hays County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 77,531 | 2nd of 13 | 35th of 1,990 |
| Median household income | $90k | 7th of 9 | 316th of 1,172 |
| Median home value | $330k | 10th of 11 | 322nd of 1,172 |
Its median household income is higher than in 73% of U.S. residential ZIP codes, and it is denser than 77% 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 78640?
The 2020 Census counted 64,539 people in 78640; the ACS, which samples households over 2020-2024, estimates 77,531. Between the 2010 and 2020 censuses its population grew 50.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 77,531
- 2020 Census count
- 64,539+50.3% since 2010 (42,954)
- Households
- 27,375
- Median age
- 33.4
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 78640?
Of the 77,531 people the ACS estimates in 78640, 26.3% are under 18 and 7.5% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (56.7%), then White (not Hispanic) (33.9%).
- Under 1826.3%
- 18 to 6466.2%
- 65 and older7.5%
- Hispanic or Latino56.7%
- White, not Hispanic33.9%
- Black, not Hispanic4.7%
- Other or two or more3.6%
- Asian, not Hispanic1.1%
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 78640 earn?
Median household income is $90,075 (ACS 2020-2024), the 7th highest of the 9 ranked ZIP codes in Hays County. It is not measurably different from 2015-2019 ($92,870 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $90,075
- Income per person
- $36,864
- Below the poverty line
- 10.2%
- Unemployed (of the labor force)
- 3.2%
- Adults 25+ with a bachelor's degree
- 29.3%
- Adjusted gross income per tax return, 2022
- $67,10335,970 returns; wages 82% 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 78640?
FHFA's house price index for 78640, built from repeat sales and appraisals of the same homes, rose 93% from 2015 to 2025 and rose 40% from 2020 to 2025, and moved −4.9% in 2025.
- Median home value (owners' estimate)
- $330,400
- Median gross rent
- $1,730
- Homes owned by their occupants
- 71.0%
- Housing units
- 28,135
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 78640?
1,025 business establishments had a location in this ZIP code in 2023, 394 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction174
- Health care and social assistance139
- Retail trade113
- Accommodation and food services107
- Other services (except public administration)103
- Professional, scientific, and technical services91
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 78640?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78610 | Buda | 48,319 | $120k | 6.0 mi |
| 78656 | Maxwell | 2,847 | $81k | 6.3 mi |
| 78644 | Lockhart | 22,348 | $75k | 12.2 mi |
| 78666 | San Marcos | 88,583 | $55k | 12.5 mi |
| 78619 | Driftwood | 6,693 | $183k | 14.9 mi |
| 78676 | Wimberley | 15,822 | $87k | 20.5 mi |
| 78652 | Manchaca | 5,287 | $133k | 9.9 mi (near) |
| 78747 | Austin | 22,180 | $93k | 10.2 mi (near) |
| 78748 | Austin | 55,631 | $115k | 11.4 mi (near) |
| 78655 | Martindale | 3,730 | $56k | 12.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.