Sheridan is a census-designated place in Placer County, California, United States.

[5] The Sheridan post office opened in 1868, closed for a time in 1870, and re-opened.

The Supervisor currently elected to the Sheridan area district is Robert Weygandt.

[6] According to the United States Census Bureau, the CDP covers an area of 26.0 square miles (67.5 km2), 99.98% of it land, and 0.02% of it water.

There were 447 housing units at an average density of 17.2 per square mile (6.6/km2), of which 309 (74.6%) were owner-occupied, and 105 (25.4%) were occupied by renters.