Rio Vista, San Marcos, Texas has a balanced but softer investment profile: pricing is in line with San Marcos and about 8% above Texas, with a gross yield of 5.2% and prices down 5.4% over the past year. The neighborhood posts a walkability of 60 and education in the 25th percentile. A Red Flag score of 69 indicates a moderate risk backdrop, while the yield is the main strength in the numbers.
AI Summary•Updated May 2026
Area
2.09 mi²
ZIP Code
78666
County
Hays County
State
Texas
Redfin — median sale & volumeZillow ZORI — asking rentFEMA National Risk Index v1.20OpenStreetMap — POIFBI UCR — state crimeEPA — radon zonesWashU ACAG — satellite PM2.5EPA FRS / BTS — hazard screeningUS Census ACS / TIGER 2024
Verified Price · Median Sale
$320,611
YoY-5.4%
Gross Rental Yield
5.2%
Listed rent · ZORI annualized
Red Flag Index
High
69 / 100
Walkability Score
60
Somewhat Walkable
OpenStreetMap POI density · national percentile
Education Score
25 / 100
Limited · better than 25% of U.S. districts
Pre-pandemic SEDA (2018/19) · district proxy
AI Score
49
Fair
DistrictScore attractiveness · national model
Rio Vista Property Prices & Rental Yield
Verified Redfin sale data and Zillow ZORI asking rent for Rio Vista, San Marcos.
Market Trend (12-Month)
12 Months
$346K$339K$333K$327K$321K
Verified Sale Price (Median)
Jun '25May '26
Verified = Redfin median sale price (MLS). Rolling 3-month series.
Unlock the Rio Vista 12-month price trend
See the full Verified vs Listed price history — free with a DistrictScore account.
FEMA National Risk Index composite across eight hazards, plus inherited Texas crime context.
Red Flag Breakdown
69 / 100
High Risk
Composite is weighted by expected impact — frequent low-damage hazards (hail, wind) weigh less than flood or wildfire.
Wildfire100Very High
Tornado100Very High
Heat100Very High
Hail100Very High
Strong Wind80Very High
Hurricane60High
Flood40Moderate
Earthquake20Low
8/8 hazards scored · FEMA NRI v1.20
Crime (state-level): Texas averaged 24.3 crimes and 3.9 violent per 1,000 residents (-6.2% YoY) in 2024(FBI UCR). Compare the state to the country, not states as a ranking — full Safety & Crime data lives on the state page.
Active transaction volume — 272 homes sold last period
Wildfire risk is Very High (100/100)
Tornado risk is Very High (100/100)
Insights are generated from Rio Vista's live DistrictScore metrics.
Rio Vista Environment & Safety
Satellite PM2.5 air-quality history, FBI UCR crime trend (Texas-level, the finest official aggregation), EPA radon potential and point-source hazard screening.
Air Quality — PM2.5
2015–2024
7.6 µg/m³ Meets EPA, above WHO guideline+25.9% since 2015
9.67.96.24.5
EPA 9WHO 5
20152024
Annual mean fine-particle (PM2.5) concentration at the Rio Vista centroid, satellite-derived (ACAG). References: WHO guideline 5 µg/m³ · EPA annual standard 9 µg/m³. Latest year ranks worse than 92% of U.S. neighborhoods.
Texas Crime Trend
FBI UCR
37180
20132024
All crimes / 1k
Violent / 1k
Year
Crimes / 1k
Violent / 1k
YoY
2024
24.3
3.9
-6.2%
2023
26.4
4.1
-1.7%
2022
27.4
4.4
+6.3%
2021
26.3
4.5
-1.8%
2020
26.9
4.5
-3.6%
2019
28.3
4.2
—
Reported at the state level — the finest official US crime aggregation; Rio Vista inherits the Texas figures.
Radon Potential
EPA
Zone 3
Zone 3 — Lowest potential · Rio Vista
EPA radon zones estimate indoor radon potential county-wide (Zone 1 highest, Zone 3 lowest). Testing is recommended in all zones.
Environmental Hazards
EPA / BTS
Industrial odor3 nearbyVery High
Point-source screening near Rio Vista: EPA Superfund National Priorities List & Facility Registry (2026), BTS aviation noise (2020, 24-hour average level). Superfund shows distance to the nearest listed site; odor shows detected sources within the screening radius. Only detected sources are listed; the bar shows severity vs. all U.S. neighborhoods.
Walkability & Amenities in Rio Vista
Amenity density and pedestrian access from OpenStreetMap points of interest.
Walkability & Amenities
OpenStreetMap POI
60
Somewhat Walkable
Walkability Score
4
Grocery
12
Dining
2
Schools
3
Universities
1
Hospitals
1
Pharmacies
5
Parks
0
Rail Transit
0
Coworking
POI counts are amenities within Rio Vista's boundary plus a 400 m walk buffer. Rail transit excludes bus stops.
Rio Vista vs San Marcos vs Texas
How Rio Vista benchmarks against its city and state medians.
Benchmark vs City & State
Across Rio Vista, the median sale price sits in line with the median for San Marcos neighborhoods and about 8% above the statewide median. Gross rental yield is 5.2%, against 5.2% for San Marcos neighborhoods and 5.4% statewide. Over the past 12 months, prices fell 5.4%. Transaction liquidity sits in line with the median for San Marcos neighborhoods and above the statewide median.
Rio Vista, San Marcos, Texas shows a mixed profile. Pricing is in line with San Marcos and about 8% above Texas, gross yield is 5.2%, and prices are down 5.4% over the past year. The Red Flag score is 69, which indicates a moderate risk backdrop.
Neighborhoods near Rio Vista
Compare Rio Vista with nearby neighborhoods in San Marcos.