Round Valley, Plumas County, California

Round Valley is a former settlement in Plumas County, California, at an elevation of 4521 feet (1378 m). Round Valley is located northwest of the Round Valley Reservoir, 3 mi south of Greenville, and 3.5 mi west-northwest of Crescent Mills.

The Round Valley post office opened in 1863, closed for a time in 1870, and closed finally in 1873.