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Sarah Mitchell
Compass Real Estate · ZIP 78666
“Your trusted relocation specialist since 2009. 350+ homes sold. Zero-pressure, data-first approach.”
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78666 ZIP Code Housing Market
$323,164median sale price
What is the 78666 housing market like right now?
The median home sale price in ZIP code 78666 is $323,164, down 9.5% year-over-year. Homes sell in an average of 82 days with 484 active listings. The market is currently a leaning buyer's. (Source: Redfin monthly MLS data, as of March 2026 — the most recent Redfin release; Redfin publishes each month's data on a ~6-week lag.)
Is the 78666 ZIP code a buyer's or seller's market?
ZIP code 78666 is currently a leaning buyer's and homes selling in about 82 days. How we determine this →
What are the latest 78666 housing market stats?
| Metric | Value |
|---|---|
| Median sale price | $323,164 |
| Median list price | $335,000 |
| Year-over-year price change | -9.5% |
| Average days on market | 82 days |
| Active inventory | 484 listings |
| Sale-to-list price ratio | 97.1% |
| Market condition | Leaning buyer's |
Source: Redfin · Updated monthly
The 78666 zip code, located in San Marcos, TX, is currently classified as a leaning buyer's. The median sale price stands at $323,164, representing a -9.5% change year over year. Homes in this area spend an average of 82 days on the market before going under contract. There are currently 484 active listings in the area, which influences how much negotiating power buyers and sellers have.
ZIP 78666 sits in the San Marcos, TX area, roughly 3 miles from downtown San Marcos. Because home prices are set street by street, this ZIP can move differently from San Marcos's citywide averages. The figures below reflect 78666 specifically — drawn from Redfin transactions, U.S. Census data for its 88,583 residents, and Zillow value estimates.
Homes sold
262
Last 12 weeks
Days on market
82
Average pace
Active listings
484
Sale-to-list
97.1%
Below asking
What is driving the 78666 housing market?
The 78666 real estate market is shaped by a combination of local demand, housing supply, and broader economic trends. As a leaning buyer's, homes are selling at approximately 97.1% of their listed price.
Year-over-year price trends are one of the most important indicators for both homebuyers and investors. Prices in 78666 have declined -9.5% compared to last year, which may present opportunities for buyers looking to enter the market at a lower price point. For context, it's valuable to compare this trend against neighboring zip codes and the broader metro area to determine whether this performance is localized or part of a regional pattern.
The Zillow Home Value Index (ZHVI) for 78666 stands at $315,964, which represents Zillow's estimate of the typical home value in the area. The Zillow Observed Rent Index (ZORI) indicates typical rents of $1,395 per month. This gives a price-to-rent ratio of approximately 18.9, which sits in a moderate range where the buy-versus-rent decision depends heavily on individual financial circumstances and time horizon. Use our mortgage calculator to estimate monthly payments based on current home values and interest rates.
Who lives in 78666?
Population
88,583
Median income
$54,737/yr
Median age
26.9 years
Owner-occupied
38.1%
College grads
35.6%
Avg commute
31.61 min
What is it like living in 78666?
Zip code 78666 is home to approximately 88,583 residents. The median household income is $54,737 per year, which shapes the types of homes and amenities available in the area. With a median age of 26.9 years, the community's age profile influences everything from school enrollment to local business types and recreational offerings. Approximately 38.1% of housing units are owner-occupied, reflecting a predominantly renter-occupied area that may appeal to investors looking for rental income opportunities.
About 35.6% of residents hold a bachelor's degree or higher, which often correlates with access to knowledge-economy jobs and higher earning potential in the area. The average commute time is 31.61 minutes, which is close to the national average. These demographic factors, combined with the market data above, help paint a complete picture of what it's like to live and own property in 78666.
Which public schools serve ZIP 78666?
15 schools tracked · 9,312 students
The largest public schools serving ZIP code 78666 by enrollment, drawn from the National Center for Education Statistics. School quality is a commonly cited factor in home-buying decisions — these are the campuses families in this area are most likely to encounter.
SAN MARCOS H S
Grades 9-12 · 2,494 students
MILLER MIDDLE
Grades 6-8 · 908 students
GOODNIGHT MIDDLE
Grades 6-8 · 867 students
BLANCO VISTA EL
Grades PK-5 · 718 students
DEZAVALA EL
Grades K-5 · 591 students
BOWIE EL
Grades K-5 · 577 students
MENDEZ EL
Grades K-5 · 540 students
HERNANDEZ EL
Grades K-5 · 531 students
Source: National Center for Education Statistics, Common Core of Data directory. Updated annually. Ratings and test scores are not currently displayed.
Frequently asked questions about 78666
What is the median home price in 78666?
The current median sale price in 78666 is $323,164, based on recent Redfin transaction data. Prices have changed -9.5% compared to last year. For the most up-to-date pricing and to see how this compares to nearby areas, use our comparison tool.
Is 78666 a buyer's or seller's market?
The 78666 zip code is currently classified as a leaning buyer's. This assessment is based on key indicators including months of supply, sale-to-list price ratios, and average days on market.
What is the population of zip code 78666?
Zip code 78666 has a population of approximately 88,583 residents. The median household income is $54,737 per year. About 38.1% of homes are owner-occupied. This data is sourced from the U.S. Census Bureau and is updated annually.
How do I research neighborhoods in 78666?
Properties Incorporated provides comprehensive data for 78666 including median home prices, price history charts, days on market, active inventory, and Census Bureau demographics. To compare this area with other zip codes or cities, use our comparison tool. For mortgage planning, our mortgage calculator estimates monthly payments based on current prices and interest rates.
How often is the data for 78666 updated?
Market data on Properties Incorporated is updated regularly as new information becomes available. Redfin sales data is typically refreshed monthly, Zillow home value and rent estimates update monthly, and Census Bureau demographics are updated annually.
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