 At the 2010 census Rosamond had a population of 18,150.The population density was 346.8 people per square mile (133.9/km²).The racial makeup of Rosamond was 11,294 (62.2%) White, 1,476 (8.1%) African American, 221 (1.2%) Native American, 658 (3.6%) Asian, 66 (0.4%) Pacific Islander, 3,258 (18.0%) from other races, and 1,177 (6.5%) from two or more races.