San Marcos, TX ZIP codes
0 ZIP codes lie mostly inside San Marcos and 2 more cross into it. For each one: residents, median age, household income, home value, rent and homeownership, so you can see how different parts of the city compare.
ZIP codes partly in San Marcos
| ZIP | Share in city | Residents | Median age | Household income | Home value | Rent | Homeowners |
|---|---|---|---|---|---|---|---|
| 78656 | 11% | 2,847 | 32.5 | $81,346 | $238,100 | $1,629 | 69% |
| 78666 | 17% | 88,583 | 26.9 | $54,737 | $306,700 | $1,319 | 38% |
"Share in city" is the part of each ZIP code's land area inside San Marcos city limits. Figures describe the whole ZIP code. Sources: Census Bureau 2020 ZIP Code Tabulation Areas (which closely follow USPS ZIP codes) and ACS 2020-2024 5-year estimates. Small ZIP codes have wide margins of error; "n/a" means the Census Bureau did not publish a value. Click a column to sort.
Frequently asked questions
How many ZIP codes are in San Marcos?
0 ZIP codes lie mostly inside San Marcos, and 2 more are partly in the city, by the Census Bureau's 2020 ZIP Code Tabulation Areas. PO box and single-building ZIP codes have no residents and are not listed.
Which San Marcos ZIP code has the highest income?
78656 has the highest median household income, $81,346, and 78666 the lowest, $54,737 (ACS 2020-2024, ZIP codes with 1,000+ residents).
Where is rent cheapest in San Marcos?
By ZIP code, median gross rent is lowest in 78666 ($1,319 a month) and highest in 78656 ($1,629).
Compare the whole city with others on the San Marcos profile, or see San Marcos population by year.