Dorrington is a census-designated place in Calaveras County, California, United States. The population was 609 at the 2010 census, down from 727 at the 2000 census. Originally known as Cold Spring Ranch until 1902, the town sits on State Route 4 and historically was a stopping point along the toll road between Murphys and Ebbetts Pass, often serving as a resort for visitors to what is now Calaveras Big Trees State Park.