Rosamond is a census-designated place (CDP) in Kern County, California, USA, near the Los Angeles county line. north of Palmdale, in the Antelope Valley, the westernmost desert valley of the Mojave Desert. Rosamond is also south of Mojave, and north of Lancaster at an elevation of 2342 feet (714 m). According to 2010 United States census data, the town population was 18,150.