San Mateo County, CA Property & Market Data

San Mateo County, California has 219,957 parcels tracked in the Rippleffekt property database, 100% of them mapped to a precise location, a median household income of $158,569, and an unemployment rate of 4.5%.

San Mateo County at a glance

Rippleffekt tracks 219,957 parcels in San Mateo County, California. The figures below combine county assessor coverage with federal economic data for the county.

219,957
Parcels tracked
100%
Mapped to location
218,838 parcels
449 sq mi
Land area
490.3 per sq mi
Parcel density
$158,569
Median household income
4.5%
Unemployment rate

California commercial real estate lending

Statewide commercial real estate lending context from FFIEC bank call reports as of 2024-12-31. This reflects the broader California lending environment, not San Mateo County alone.

129
Banks reporting
$280.7B
Real estate loans
$124.7B
Nonresidential CRE loans

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Sources: county assessor records, U.S. Census ACS and SAIPE, FFIEC bank call reports, and public tax-lien records. Updated 2026-07-29.