Cromberg (formerly, Twenty-Mile House, Taft, and Teft) is a census-designated place (CDP) in Plumas County, California, United States. Cromberg is located on the Western Pacific Railroad, 6.5 miles (10.5 km) northwest of Blairsden. The population was 261 at the 2010 census, down from 290 at the 2000 census.
The Cromberg post office opened in 1880, closed in 1912, reopened in 1919, closed again in 1931, and reopened in 1950. The ZIP code is 96103.
Cromberg is located at 39°52′7″N 120°42′25″W / 39.86861°N 120.70694°W / 39.86861; -120.70694 (39.868589, -120.707044).