Census place · GEOID 4865600 · Hays County
San Marcos, TX ZIP codes
3 ZIP/ZCTAs intersecting this Census place in Hays County.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place San Marcos (GEOID 4865600). Methodology
Combined population of ZIP/ZCTAs intersecting this place: 162,188 (3 ZIPs).
Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology
Map of San Marcos, TX
ZIP/ZCTA overlap with San Marcos
Population overlap
Share of each ZIP/ZCTA’s population located within San Marcos, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting San Marcos
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 78640 | Kyle | Hays County | 71,460 | $88,533 |
| 78656 | Maxwell | Caldwell County | 2,953 | $78,058 |
| 78666 | San Marcos | Hays County | 87,775 | $55,478 |
USPS associates these ZIPs with San Marcos
These codes list San Marcos as a primary or acceptable city. They are not used for the ACS headline.
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 78667 | San Marcos | Hays County | 1,571 | — |