About San Geronimo, California

San Geronimo (formerly, Nicasio) is a census-designated place (CDP) located in the San Geronimo Valley in Marin County, California in the United States. San Geronimo is located 8 miles (13 km) southwest of downtown Novato, at an elevation of 292 feet (89 m). The population was 446 at the 2010 census.

News from San Geronimo

San Geronimo Facts

  • Population Total: 446
  • Square Miles: 1.508
  • Area Code: 415
  • Elevation: 292
  • Postal Codes: 94963
  • Timezone: Pacific