 The 2010 United States Census reported that Arcadia had a population of 56,364.The population density was 5,062.5 people per square mile (1,954.6/km2).The racial makeup of Arcadia was 33,353 (59.2%) Asian, 18,191 (32.3%) White, (25.7% Non-Hispanic European whites), 681 (1.2%) African American, 186 (0.3%) Native American, 16 (0.03%) Pacific Islander, 2,352 (4.2%) from other races, and 1,585 (2.8%) from two or more races.