Leavitt is an unincorporated community in Lassen County, California, United States, located alongside the Southern Pacific Railroad, Fernley and Lassen Railway branch, 7 miles (11 km) east of Susanville,[2] and 7 miles west of Litchfield, at an elevation of 4,104 feet (1,251 m).

[1] It is the site of the High Desert State Prison.

Benjamin Hanson Leavitt (1834–1918), a pioneer rancher and lumberman who came from the state of Maine, settled in Lassen County in 1864[3] and proposed to build this town on his ranch in 1912.

Benjamin Leavitt engineered the Honey Lake Valley irrigation system, including Leavitt Lake.

[6] (The town was renamed Leavitt Lake in 1973 when house construction began there.