Unshakable ZIP Data 78666 | San Marcos, TX Housing Market
San Marcos · Hays County · Austin-Round Rock-Georgetown, TX metro · Texas · Data updated June 19, 2026
The median sale price in ZIP 78666, San Marcos, Texas is $320,611 at $182 per square foot. 272 single-family homes sold in the latest period, up 4.1 percent from a year earlier. Homes sit a median of 82 days on market with 5.9 months of supply. Sellers are getting 97.2 percent of list price and 4.9 percent of homes sold above asking.
Buyer leverage market. Negotiate hard.
Value anchors
| Metric | Value | Year over year |
|---|---|---|
| Average single-family value | $319,425 | |
| Average price per sq ft | $181 | |
| Median sale price | $320,611 | |
| Median sale price per sq ft | $182 | |
| Median home size | 1,762 sq ft | |
| Median new listing price | $332,161 | -7.7% |
| National size rank | 102 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 272 | +4.1% |
| Median days on market | 82 days | |
| Months of supply | 5.9 months | |
| New listings | 402 | -8.2% |
| Active listings | 831 | -0.3% |
| Pending sales | 322 | +3.0% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 97.2% | +0.2 pts |
| Share sold above list | 4.9% | -3.1 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
2-bedroom
$284,542
3-bedroom
$297,833
4-bedroom
$353,933
5-bedroom
$421,593
These figures describe the single-family market for San Marcos, Texas ZIP 78666. They are market context, not a substitute for sold comps or a formal appraisal.