San Antonio Creek (Marin County, California)

San Antonio Creek
Arroyo de San Antonio
San Antonio Creek watershed (Interactive map)
EtymologySpanish
Location
CountryUnited States
StateCalifornia
RegionMarin and Sonoma counties
Physical characteristics
Source 
 • location7 mi (11 km) southwest of Petaluma, California
 • coordinates38°10′54″N 122°44′36″W / 38.18167°N 122.74333°W / 38.18167; -122.74333
 • elevation790 ft (240 m)
MouthPetaluma River
 • location
west of Lakeville
 • coordinates
38°9′30″N 122°32′39″W / 38.15833°N 122.54417°W / 38.15833; -122.54417
 • elevation
0 ft (0 m)
Length17.5 mi (28.2 km)

San Antonio Creek is a northward then eastward-flowing stream in the California, United States, counties of Marin and Sonoma that forms part of the boundary between those counties. It empties into the tidal portion of the Petaluma River.