Wetlands in San Mateo County, California
San Mateo County, California has 21,523 acres wetland mapped. The map below shows every mapped feature inside the county boundary.
San Mateo County, California at a glance
| Wetland mapped | 21,523 acres |
|---|---|
| Distinct wetlands mapped | 4,587 |
| Share of the county that is wetland | 7.3% |
| Most common wetland type | Riverine (2,000) |
| Distinct wetland types | 7 |
| Largest single wetland | 2,203 acres (Estuarine and Marine Deepwater) |
San Mateo County, California is home to 743,568 residents. Land Owl's national wetlands layer records the following within the county boundary — Wetland mapped: 21,523 acres. Distinct wetlands mapped: 4,587. Share of the county that is wetland: 7.3%. Most common wetland type: Riverine (2,000). Distinct wetland types: 7. Largest single wetland: 2,203 acres (Estuarine and Marine Deepwater). Every feature shown on the map above is clickable, and the figures on this page are derived from the same data the map renders, so they always agree. A free Land Owl account adds parcel boundaries, ownership records, flood zones, soils, wetlands and topography over the same view.
Frequently asked questions
- How many wetlands are there in San Mateo County, California?
- Land Owl maps 21,523 acres wetland mapped within San Mateo County, California.
- Is this wetlands map free to use?
- Yes. This map is free to view. A free Land Owl account unlocks the other data layers, parcel boundaries and ownership records.
- Where does this data come from?
- Land Owl maps wetlands from the U.S. Fish & Wildlife Service National Wetlands Inventory (NWI). NWI-mapped wetlands are a screening tool, not a jurisdictional delineation — confirm any boundary with a qualified delineator before you rely on it.
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