San Marcos, TX ZIP Codes
2 ZIP codes · 410 homes for sale right now. Pick a ZIP for its listings, market snapshot and neighborhoods.
San Marcos, TX is covered by 2 ZIP codes in HomeLocating's coverage: 78656 and 78666. A ZIP code is a quick way to narrow a home search to one part of town, so each ZIP below has its own page with the homes currently for sale, a market snapshot, the communities and neighborhoods inside it, and nearby ZIP codes.
Right now there are 410 active homes for sale across these ZIPs, the most in 78666 (404). In Unlock MLS's July 2026 ZIP scorecard, the median closed-sale price in 78666 was $277,990, a closed-sale figure separate from live list prices.
ZIP codes are postal delivery areas rather than city limits. Some ZIPs listed under San Marcos also reach into neighboring towns or unincorporated areas, and a home with a San Marcos mailing address can sit in a ZIP shown under a neighboring city. Use a ZIP page for the part of town you care about, and the San Marcos homes-for-sale page for the whole city.
Coverage on this page comes from the ZIP codes of the homes in our MLS feed for San Marcos and, where published, Unlock MLS's Central Texas ZIP scorecard. A ZIP with no homes for sale today keeps its own page, so you can bookmark it, read about the area and get alerted when something lists.
San Marcos ZIP codes at a glance
| ZIP | Area | Homes for sale | Median closed-sale price |
|---|---|---|---|
| 78656 homes for sale | Maxwell | 6 active | — |
| 78666 homes for sale | Includes Kissing Tree, River Bridge Ranch, and La Cima | 404 active | $277,990 |
Median closed-sale price: Unlock MLS Central Texas ZIP Code Scorecard, July 2026, where published for the ZIP.
How to search San Marcos by ZIP code
- Pick a ZIP from the table to see its live listings, price range and median list price.
- Counts refresh with our MLS feed, so a ZIP with no homes today can have new listings tomorrow — every ZIP page stays live either way.
- Compare neighboring ZIPs from any ZIP page, or open the San Marcos housing market page for city-wide trends.
- Prefer to talk it through? Reach out and we'll help you choose between San Marcos ZIP codes based on your budget and commute.