GeraSure / US Road Fatality Risk / Counties / SAN MATEO (81), CA
SAN MATEO (81) County, California: Road Fatality Risk
Gera US Road Fatality Index: 0/10 (Very Low) · 41/yr avg · 5.56/100k. Risk-context signals only.
What is the road fatality rate for SAN MATEO (81) County, California?
SAN MATEO (81) County, California averaged 41 road fatalities per year from 2021 to 2023 (NHTSA FARS), giving a rate of 5.56 per 100,000 population — 7.14/100k below the US average of 12.695/100k. Gera US Road Fatality Index: 0/10 (Very Low).
Road fatality data — SAN MATEO (81) County (FARS 2021-2023 / Census PEP 2023 / FHWA VM-2 2023)
| Metric | Value | Source |
|---|---|---|
| Road fatalities 2021 | 36 | NHTSA FARS 2021 |
| Road fatalities 2022 | 48 | NHTSA FARS 2022 |
| Road fatalities 2023 | 38 | NHTSA FARS 2023 |
| 3yr average annual fatalities | 40.7 | Gera calculation |
| 3yr average population | 731,477 | Census PEP 2021-2023 |
| Fatalities per 100k population | 5.56 | Gera formula |
| US average per 100k | 12.695 | NHTSA FARS 2021-2023 |
| GUSRFI score | 0/10 | Very Low |
SAN MATEO (81) County Road Fatality Risk Explorer
Explore GUSRFI components and compare against the US average.
GUSRFI
0 / 10
Very Low
SAN MATEO (81) County, CA
SAN MATEO (81) County, CA has a Very Low road fatality index (5.6/100k). Substantially below the US average of 12.7/100k.
Source: NHTSA FARS 2021-2023 + Census PEP 2023 + FHWA VM-2 2023. Risk-context index only.
Risk signal components
US avg: 12.7/100k · Source: NHTSA FARS + Census PEP
County GUSRFI uses fatalities per 100k only (per-county VMT not available key-free from FHWA).
Avg annual fatals
41
2021-2023
Per 100k pop
5.56
3yr avg
California state context
California has a state GUSRFI of 4.3/10 (Moderate), with 11.285/100k (3yr avg). SAN MATEO (81) County (5.56/100k) is 5.73/100k below the state average.
View California state page →Get road-risk insurance tools for SAN MATEO (81) County
GeraSure is building county-level auto-insurance comparison tools. SAN MATEO (81) County has a very low road fatality rate (5.56/100k). Join the waitlist.
SAN MATEO (81) County road fatality rate: frequently asked questions
- How many road fatalities occur in SAN MATEO (81) County per year?
- NHTSA FARS recorded 36 road fatalities in SAN MATEO (81) County, California in 2021; 48 in 2022; and 38 in 2023 — a 3-year average of 40.7 per year.
- How does SAN MATEO (81) County compare to the US average for road fatalities?
- SAN MATEO (81) County has 5.56/100k road fatalities — 7.14/100k below the US average of 12.695/100k (NHTSA FARS 2021-2023 average). The state average for California is 11.285/100k (GUSRFI 4.3/10).
- What is SAN MATEO (81) County's GUSRFI score?
- SAN MATEO (81) County has a Gera US Road Fatality Index (GUSRFI) of 0/10 (Very Low). County GUSRFI is based on fatalities per 100k population, normalized against the state-level range (min 5.659, max 24.943 per 100k). It ranks among the top 190 counties by road fatality count in the US (out of 350 counties tracked).
Other California counties in the GUSRFI dataset
All counties →Contains public sector information published by NHTSA / US Census Bureau and licensed under the US Government public domain. Source: NHTSA Fatality Analysis Reporting System (FARS) — annual national CSV ZIPs 2021-2023 (FARS 2021-2023 / Census PEP 2023 / FHWA VM-2 2023, published 2024-2025).
Full GUSRFI formula: Gera US Road Fatality Index methodology · State rankings