Flood Safety Ranking — San Marcos
Updated June 22, 2026
See how neighborhoods in San Marcos compare on flood safety. Rankings are based on measured data aggregated across each neighborhood boundary. How flood safety is measured →
Top Flood Safety Neighborhoods — Ranked
Flood safety in this area is significantly higher than the San Marcos average, though some residual risk remains due to its location within the 500-year floodplain according to iHuus data.
Flood safety in this area is significantly higher than the San Marcos average, though some residual risk remains due to its location within a 500-year floodplain. According to iHuus data, the neighborhood is situated in a zone with much lower flood exposure than most of the city.
Residual flood risk exists within this area, though safety levels remain significantly higher than the San Marcos city average according to iHuus data.
Full San Marcos Flood Safety Ranking
| Neighborhood | Score | City Rank | vs. City Avg |
|---|---|---|---|
| Sierra Circle | 7.7 | #1 | +4.0 ↑ |
| Tanglewood | 7.7 | #2 | +4.0 ↑ |
| Hills of Hays | 7.2 | #3 | +3.5 ↑ |
| Westover | 6 | #4 | +2.3 ↑ |
| Downtown | 5.9 | #5 | +2.2 ↑ |
| Hughson Heights | 5.7 | #6 | +2.0 ↑ |
| El Camino Real | 5.7 | #7 | +2.0 ↑ |
| Heritage | 5.5 | #8 | +1.8 ↑ |
| Holland Hills | 5.3 | #9 | +1.6 ↑ |
| Willow Creek | 5.2 | #10 | +1.5 ↑ |
| Castle Forest | 4.6 | #11 | +0.9 ↑ |
| Southwest Hills | 4.5 | #12 | +0.8 ↑ |
| Dunbar | 4.5 | #13 | +0.8 ↑ |
| Sunset Acres | 4.4 | #14 | +0.7 ↑ |
| Millview West | 4.3 | #15 | +0.6 ↑ |
| Cottonwood Creek | 4.3 | #16 | +0.6 ↑ |
| Two Rivers East | 4.2 | #17 | +0.5 ↑ |
| Mockingbird Hills | 4.1 | #18 | +0.4 ↑ |
| Wallace Addition | 4.1 | #19 | +0.4 ↑ |
| Forest Hills | 3.9 | #20 | +0.2 ↑ |
| Millview East | 3.7 | #21 | — |
| Blanco Vista | 3.5 | #22 | -0.2 ↓ |
| Hunter's Hill | 3.3 | #23 | -0.4 ↓ |
| East Guadalupe | 3 | #24 | -0.7 ↓ |
| Oak Heights | 2.7 | #25 | -1.0 ↓ |
| Rio Vista | 2.5 | #26 | -1.2 ↓ |
| Blanco River North | 2.4 | #27 | -1.3 ↓ |
| Sessom Creek | 2.2 | #28 | -1.5 ↓ |
| Victory Gardens | 2.1 | #29 | -1.6 ↓ |
| Fiarlawn | 2.1 | #30 | -1.6 ↓ |
| Spring Lake Hills | 1.8 | #31 | -1.9 ↓ |
| Blanco Gardens | 1.7 | #32 | -2.0 ↓ |
iHuus Neighborhood Intelligence Insights
Get block-level neighborhood insights for San Marcos
- Street-level scores — see how individual blocks compare, not just neighborhood averages
- Micro-zone boundaries — identify quiet pockets, flood boundaries, and walkable clusters before you visit
- 15 dimensions in full — walkability, noise, air quality, school quality, insurance coverage, population age profile, urban/rural index, and more
- Boundary risk alerts — know if your address sits near a block boundary where scores drop, the kind of detail no listing will ever mention
- School insights — individual school ratings and insights, not just district-level data
- Compare before you commit — side-by-side data across neighborhoods, down to block precision
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