Residential delivery area · Texas
ZIP Code 78631: Harper, TX
ZIP code 78631 uses the postal name Harper, Texas and lies mostly in Kimble County (49% of its land), reaching into Gillespie County and Kerr County (Census 2020 ZIP-county file). About 3,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $78,560 (Census Bureau, ACS 2020-2024). By Census place, 19% of its land lies in Harper (a census-designated place); 81% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Harper · its only residential ZIP
- County
- Kimble County (49%); Gillespie County (44%); Kerr County (7%)
- Census places
- Harper census-designated place
- House districts
- TX-21 (51%), TX-11 (49%) 119th Congress, by share of land
- State
- Texas
- Time zone
- Central
- Land area
- 299.8 sq mi · 12 people per sq mi
Where is ZIP code 78631?
78631 centers on 30.340°, -99.307° and covers 299.8 square miles of land plus 0.2 of water. It borders 7 ZIP codes: 78618, 76854, 78028, 78058, 76856, 78624, 76849.
The map draws ZIP code areas only. For the streets inside 78631, 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 78631 compare with the rest of Kimble County?
| Measure | 78631 | In Kimble County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 3,465 | 2nd of 6 | 1,120th of 1,990 |
| Median household income | $79k | not ranked | not ranked |
| Median home value | $352k | not ranked | not ranked |
78631's median household income is not ranked: its 90% margin of error (±$40,726) is more than a quarter of the figure ($78,560); 78631's median home value is not ranked: its 90% margin of error (±$92,338) is more than a quarter of the figure ($351,600). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 18% of 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 78631?
The 2020 Census counted 2,698 people in 78631; the ACS, which samples households over 2020-2024, estimates 3,465. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 3,465±593 (90% margin)
- 2020 Census count
- 2,698
- Households
- 1,269
- Median age
- 43.4
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 78631?
Of the 3,465 people the ACS estimates in 78631, 21.3% are under 18 and 25.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (71.7%), then Hispanic or Latino (22.0%).
- Under 1821.3%
- 18 to 6453.2%
- 65 and older25.5%
- White, not Hispanic71.7%
- Hispanic or Latino22.0%
- Other or two or more6.3%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
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 78631 earn?
Median household income is $78,560 (ACS 2020-2024).
- Median household income
- $78,560±$40,726
- Income per person
- $35,226
- Below the poverty line
- 11.1%
- Unemployed (of the labor force)
- 0.6%
- Adults 25+ with a bachelor's degree
- 24.0%
- Adjusted gross income per tax return, 2022
- $78,0681,490 returns; wages 59% 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 78631?
- Median home value (owners' estimate)
- $351,600
- Median gross rent
- $1,304
- Homes owned by their occupants
- 84.2%
- Housing units
- 1,571
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 78631?
54 business establishments had a location in this ZIP code in 2023, 14 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction15
- Retail trade6
- Administrative and support and waste management and remediation services6
- Other services (except public administration)5
- Accommodation and food services4
- Professional, scientific, and technical services3
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 78631?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78618 | Doss | 346 | $82k | 13.0 mi |
| 76854 | London | 345 | $121k | 19.9 mi |
| 78028 | Kerrville | 41,206 | $67k | 22.6 mi |
| 78058 | Mountain Home | 985 | $94k | 23.9 mi |
| 76856 | Mason | 3,532 | $75k | 24.4 mi |
| 78624 | Fredericksburg | 23,741 | $75k | 26.2 mi |
| 76849 | Junction | 3,584 | $63k | 32.0 mi |
| 78025 | Ingram | 4,999 | $71k | 18.1 mi (near) |
| 78024 | Hunt | 1,401 | $105k | 26.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.