San Mateo County, California
San Mateo County, CA: non-irrigated cash rent $51 an acre (2023); land and buildings $12,311 an acre in the 2022 census. County averages from public records, not an appraisal of any farm. FIPS 06081. Figures as of 2026-09-20.
Irrigated cash rent stands at $550 per acre in 2026, and census land value reached $12,311 per acre in 2022, up 26 percent from 2017 at 4.7 percent a year. The county spent 276 of 1357 weeks in severe drought or worse from 2000-2025, with 94 of those weeks falling in 2021-2025; 71 percent of irrigation water came from groundwater in 2015. July nightly lows have warmed at 0.48 F per decade since 1976, reaching 53.9 F for 2017-2026 against a 1991-2020 normal of 53.5 F.
too few 2023 county surveys in the state to compare
CA median $431 · 14th highest of 40
CA median $11,471 · 22nd highest of 52
CA median 43% · 13th lowest of 55
Cash rent
Dollars per acre, USDA NASS county survey. A break in a line is a year with no published survey; nothing is drawn across it.
Land value
Corn yield
Crop insurance record
Claims paid divided by total premium (the farmer share plus the federal subsidy), each closed crop year since 1996. Above the dashed line, the county's insurance book paid out more than it took in. 2026, still open, is left out.
Drought and weather
Weeks per year, U.S. Drought Monitor, with half the county or more in D2 (severe) drought or worse.
Land, water and programs
Acres enrolled in the Conservation Reserve Program, USDA FSA, by fiscal year.
Next door
| County | Dry rent | Irr. rent | Land value | Claims per $100 |
|---|---|---|---|---|
| San Mateo County | $51 2023 | $550 | $12,311 | — |
| Alameda County | $27 | $566 2025 | $13,473 | $0.89 |
| San Francisco County | — | — | $48,425 | — |
| Santa Clara County | $25 2024 | $823 2025 | $13,303 | $21.33 |
| Santa Cruz County | — | $2,220 2025 | $38,401 | $1.31 |
| Median next door | $27 1 co. | — | $25,937 | $1.31 |
Counties that share a stretch of boundary. An older rent carries its year and stays out of the median.
Cite this page
AGSIST Farmland Atlas. San Mateo County, California. Figures as of 2026-09-20, from USDA NASS, USDA RMA, USDA FSA, the U.S. Drought Monitor and NOAA. https://agsist.com/farmland-atlas/california/san-mateo-countyEvery figure is a county average from the sources named below. Ranks count counties with 10,000 acres or more in farms, in the same survey year for rent, within the state. Methods: how each figure is built. Downloads: all counties, CSV.
Sources, dates and arithmetic
"Figures as of" is the date this page's numbers last changed; it moves only when a figure on the page does. Source files and their retrieval dates are listed on the data page.
Rent: USDA NASS Cash Rents Survey, county. Land value: Census of Agriculture, operators' estimate of land and buildings. Yield: NASS county corn yields, trend fitted here over every published year since 2008. Loss ratio: claims (indemnity) divided by total premium, USDA RMA Summary of Business, 1989 on, open crop year left out. Drought: U.S. Drought Monitor, weeks with half the county or more in D2 or worse. July lows: NOAA nClimDiv county monthly minimum temperature. A dash means the record does not carry the figure or the source withheld it; the reason is printed beside it.