Bieber is an unincorporated community in Lassen County, California. It is located on the Pit River, 55 miles north-northwest of Susanville, at an elevation of 4,124 feet Its population is 266 as of the 2020 census, down from 312 from the 2010 census. For statistical purposes, the United States Census Bureau has defined Bieber as a census-designated place. The ZIP Code is 96009. The community is inside area code 530.