Residential delivery area · Texas
ZIP Code 78655: Martindale, TX
ZIP code 78655 uses the postal name Martindale, Texas and lies mostly in Caldwell County (60% of its land) with the rest in Guadalupe County (Census 2020 ZIP-county file). About 3,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $55,952 (Census Bureau, ACS 2020-2024). By Census place, 7% of its land lies in Martindale, and 2% in smaller places; 91% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2024
- ZBP2023
- IRS2022
- Town
- Martindale · its only residential ZIP
- County
- Caldwell County (60%); Guadalupe County (40%)
- Census places
- Martindale
- Metro area
- Austin-Round Rock-San Marcos, TX
- House districts
- TX-27 (60%), TX-15 (40%) 119th Congress, by share of land
- State
- Texas
- Time zone
- Central
- Land area
- 28.7 sq mi · 130 people per sq mi
Where is ZIP code 78655?
78655 centers on 29.816°, -97.835° and covers 28.7 square miles of land plus 0.2 of water. It borders 5 ZIP codes: 78670, 78656, 78666, 78644, 78638.
The map draws ZIP code areas only. For the streets inside 78655, 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 78655 compare with the rest of Caldwell County?
| Measure | 78655 | In Caldwell County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 3,730 | 7th of 14 | 1,087th of 1,990 |
| Median household income | $56k | not ranked | not ranked |
| Median home value | $270k | not ranked | not ranked |
78655's median household income is not ranked: its 90% margin of error (±$25,708) is more than a quarter of the figure ($55,952); 78655's median home value is not ranked: its 90% margin of error (±$75,650) is more than a quarter of the figure ($269,900). 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 57% 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 78655?
The 2020 Census counted 2,910 people in 78655; the ACS, which samples households over 2020-2024, estimates 3,730. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 3,730±758 (90% margin)
- 2020 Census count
- 2,910
- Households
- 1,388
- Median age
- 44.6
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 78655?
Of the 3,730 people the ACS estimates in 78655, 23.4% are under 18 and 10.4% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (63.7%), then White (not Hispanic) (31.2%).
- Under 1823.4%
- 18 to 6466.2%
- 65 and older10.4%
- Hispanic or Latino63.7%
- White, not Hispanic31.2%
- Other or two or more3.8%
- Black, not Hispanic0.8%
- Asian, not Hispanic0.5%
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 78655 earn?
Median household income is $55,952 (ACS 2020-2024).
- Median household income
- $55,952±$25,708
- Income per person
- $29,805
- Below the poverty line
- 16.5%
- Unemployed (of the labor force)
- 13.0%
- Adults 25+ with a bachelor's degree
- 20.1%
- Adjusted gross income per tax return, 2022
- $69,2991,350 returns; wages 64% 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 78655?
- Median home value (owners' estimate)
- $269,900
- Median gross rent
- $1,093
- Homes owned by their occupants
- 65.3%
- Housing units
- 1,433
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 78655?
44 business establishments had a location in this ZIP code in 2023, 8 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction9
- Retail trade5
- Professional, scientific, and technical services5
- Health care and social assistance4
- Other services (except public administration)4
- Accommodation and food 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 78655?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78670 | Staples | 130 | $79k | 3.6 mi |
| 78656 | Maxwell | 2,847 | $81k | 6.3 mi |
| 78666 | San Marcos | 88,583 | $55k | 10.1 mi |
| 78644 | Lockhart | 22,348 | $75k | 10.4 mi |
| 78638 | Kingsbury | 2,135 | $69k | 11.2 mi |
| 78622 | Fentress | 331 | – | 4.1 mi (near) |
| 78661 | Prairie Lea | 835 | $83k | 7.9 mi (near) |
| 78640 | Kyle | 77,531 | $90k | 12.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.