| Hog Island | |
| Pushpin Map: | United States San Francisco Bay Area#USA California#USA |
| Coordinates: | 38.1592°N -122.5383°W |
| Location: | Northern California |
| Waterbody: | Petaluma River |
| Area Sqft: | or |
| Area Acre: | --> |
| Length Ft: | --> |
| Width Ft: | --> |
| Coastline Ft: | --> |
| Country: | United States |
| Country Admin Divisions Title: | State |
| Country Admin Divisions Title 1: | County |
| Country Admin Divisions 1: | Sonoma |
Hog Island is an island in the wetlands of the Petaluma River in Sonoma County, California, located at 38.1592°N -122.5383°W near the Marin County line. San Antonio Creek enters the river just west of this island. It is mentioned in a newspaper article from 1914.
There are two other islands with the same name in the Bay area: Hog Island, in Tomales Bay in Marin County, and Hog Island in the Sacramento–San Joaquin River Delta in San Joaquin County.