U.S. ZIP Code tools
78666 · ZIP Code · San Marcos TX
San Marcos, TX
- City / locality
- San Marcos
- State
- Texas
- ZIP Code type
- Type not provided
- Latitude
- 29.8754
- Longitude
- -97.9404
- Coordinate source
- GeoNames Postal
- Source
- GeoNames Postal
- Source year
- Inherited source snapshot
Some U.S. place names and coordinates come from GeoNames as geographic references. They are not confirmation of the USPS preferred mailing city.
ZCTAs are Census statistical areas. Their boundaries do not represent every USPS ZIP Code or an exact postal delivery boundary.
ZIP Code map
ZCTAs are Census statistical areas. Their boundaries do not represent every USPS ZIP Code or an exact postal delivery boundary.
Population & demographics
acs/acs5 · 2024
ACS figures are five-year statistical estimates for a ZCTA. They do not describe individual addresses; consider the margin of error when comparing values.
Estimated population
88,583People · Margin of error ±1,333Median age
26.9Years · Margin of error ±0.6Median household income
54,737USD · Margin of error ±3,230Total households
33,949Households · Margin of error ±943County
Verified ZIP-to-county crosswalk data is not currently available.
Nearby postal codes
| ZIP Code | City / locality | State | Distance calculator |
|---|---|---|---|
| 78655 | Martindale | TX | 5.92 Miles / 9.52 km |
| 78656 | Maxwell | TX | 7.67 Miles / 12.35 km |
| 78670 | Staples | TX | 10.28 Miles / 16.55 km |
| 78640 | Kyle | TX | 10.54 Miles / 16.96 km |
| 78622 | Fentress | TX | 12.83 Miles / 20.65 km |
| 78667 | San Marcos | TX | 12.93 Miles / 20.81 km |
| 78130 | New Braunfels | TX | 13.24 Miles / 21.31 km |
| 78676 | Wimberley | TX | 14.66 Miles / 23.59 km |
| 78638 | Kingsbury | TX | 15.48 Miles / 24.92 km |
| 78661 | Prairie Lea | TX | 15.72 Miles / 25.29 km |
Source
Source year: 2020 Census ZCTA cartographic
U.S. Census Bureau ZCTA cartographic boundaries