 The population density was 4,900.4 people per square mile (1,892.1/km²).The racial makeup of Altadena was 22,569 (52.8%) White (40.3% Non-Hispanic White), 10,136 (23.7%) African American, 300 (0.7%) Native American, 2,307 (5.4%) Asian, 71 (0.2%) Pacific Islander, 4,852 (11.3%) from other races, and 2,542 (5.9%) from two or more races.Hispanic or Latino of any race were 11,502 persons (26.9%).