Alto, California

Alto
Location of Alto in Marin County, California.
Alto
Location in California
Coordinates: 37°54′16″N 122°31′32″W / 37.90444°N 122.52556°W / 37.90444; -122.52556
Country United States
State California
CountyMarin County
MetroSan Francisco Bay Area
Area
  Total
0.13 sq mi (0.33 km2)
  Land0.13 sq mi (0.33 km2)
  Water0.00 sq mi (0.00 km2)  0%
Elevation
26 ft (8 m)
Population
 (2020)
  Total
732
  Density5,809.52/sq mi (2,247.56/km2)
Time zoneUTC-8 (Pacific (PST))
  Summer (DST)UTC-7 (PDT)
GNIS feature ID218191; 2582933
U.S. Geological Survey Geographic Names Information System: Alto, California; U.S. Geological Survey Geographic Names Information System: Alto, California

Alto (Spanish for "Tall") is a census-designated place adjacent to Mill Valley in Marin County, California. It lies at an elevation of 26 feet (8 m). The population was 732 at the 2020 census.