Stacy was an unincorporated town in Lassen County, California. It is located north-northeast of Doyle, at an elevation of 4016 feet (1224 m). It was founded as a station on the Fernley and Lassen Railway in expectation of agricultural development of the area; without irrigation, however, the area faded away.
A post office operated at Stacy from 1912 to 1951. The name honored Stacy Spoon, the wife of the postmaster.