Residential delivery area · Texas
ZIP Code 78121: La Vernia, TX
ZIP code 78121 uses the postal name La Vernia, Texas and lies mostly in Wilson County (75% of its land) with the rest in Guadalupe County (Census 2020 ZIP-county file). About 16,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $120,048 (Census Bureau, ACS 2020-2024). By Census place, 2% of its land lies in La Vernia, and 1% in smaller places; 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- La Vernia · its only residential ZIP
- County
- Wilson County (75%); Guadalupe County (25%)
- Census places
- La Vernia
- Metro area
- San Antonio-New Braunfels, TX
- House districts
- TX-15 (98%), TX-28 (2%) 119th Congress, by share of land
- State
- Texas
- Time zone
- Central
- Land area
- 102.6 sq mi · 157 people per sq mi
Where is ZIP code 78121?
78121 centers on 29.351°, -98.089° and covers 102.6 square miles of land plus 0.3 of water. It borders 7 ZIP codes: 78161, 78152, 78101, 78160, 78124, 78155, 78114.
The map draws ZIP code areas only. For the streets inside 78121, 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 78121 compare with the rest of Wilson County?
| Measure | 78121 | In Wilson County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 16,120 | 4th of 12 | 662nd of 1,990 |
| Median household income | $120k | 1st of 7 | 110th of 1,172 |
| Median home value | $403k | 1st of 7 | 192nd of 1,172 |
Its median household income is higher than in 90% of U.S. residential ZIP codes, and it is denser than 60% 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 78121?
The 2020 Census counted 15,206 people in 78121; the ACS, which samples households over 2020-2024, estimates 16,120. Between the 2010 and 2020 censuses its population grew 33.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 16,120
- 2020 Census count
- 15,206+33.6% since 2010 (11,381)
- Households
- 5,274
- Median age
- 38.2
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 78121?
Of the 16,120 people the ACS estimates in 78121, 25.5% are under 18 and 11.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (64.8%), then Hispanic or Latino (28.5%).
- Under 1825.5%
- 18 to 6462.8%
- 65 and older11.7%
- White, not Hispanic64.8%
- Hispanic or Latino28.5%
- Other or two or more4.4%
- Black, not Hispanic2.1%
- Asian, not Hispanic0.2%
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 78121 earn?
Median household income is $120,048 (ACS 2020-2024), the highest of the 7 ranked ZIP codes in Wilson County. It is not measurably different from 2015-2019 ($117,598 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $120,048
- Income per person
- $46,254
- Below the poverty line
- 8.0%
- Unemployed (of the labor force)
- 2.7%
- Adults 25+ with a bachelor's degree
- 32.1%
- Adjusted gross income per tax return, 2022
- $104,2527,470 returns; wages 68% 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 78121?
FHFA's house price index for 78121, built from repeat sales and appraisals of the same homes, rose 79% from 2015 to 2025 and rose 46% from 2020 to 2025, and moved +3.7% in 2025.
- Median home value (owners' estimate)
- $402,600
- Median gross rent
- $1,192
- Homes owned by their occupants
- 86.9%
- Housing units
- 5,426
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 78121?
284 business establishments had a location in this ZIP code in 2023, 61 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction63
- Other services (except public administration)37
- Professional, scientific, and technical services33
- Accommodation and food services29
- Retail trade23
- Administrative and support and waste management and remediation services18
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 78121?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78161 | Sutherland Springs | 579 | $80k | 5.1 mi |
| 78152 | Saint Hedwig | 4,521 | $124k | 8.8 mi |
| 78101 | Adkins | 7,267 | $111k | 9.0 mi |
| 78160 | Stockdale | 4,885 | $65k | 13.1 mi |
| 78124 | Marion | 6,157 | $74k | 14.7 mi |
| 78155 | Seguin | 55,600 | $71k | 15.8 mi |
| 78114 | Floresville | 24,283 | $88k | 16.8 mi |
| 78263 | San Antonio | 4,253 | $80k | 13.6 mi (near) |
| 78109 | Converse | 63,067 | $91k | 15.1 mi (near) |
| 78143 | Pandora | 0 | – | 15.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.