2010 At the 2010 census Fairfax had a population of 7,441. The population density was . The racial makeup of Fairfax was 6,617 (88.9%) White, 110 (1.5%) African American, 36 (0.5%) Native American, 204 (2.7%) Asian, 4 (0.1%) Pacific Islander, 174 (2.3%) from other races, and 296 (4.0%) from two or more races. Hispanic or Latino of any race were 504 people (6.8%).
2010 at the 2010 census fairfax had a population of 7441 the population density was  the racial makeup of fairfax was 6617 (889%) white 110 (15%) african american 36 (05%) native american 204 (27%) asian 4 (01%) pacific islander 174 (23%) from other races and 296 (40%) from two or more races hispanic or latino of any race were 504 people (68%)