McClellan Park is a census-designated place (CDP) in Sacramento County, California. McClellan Park sits at an height of 69 feet (21 m). The 2010 United States Census reported that McClellan Park’s population was 743. It is the site of the former McClellan Air Force Base, closed by the federal executive in 2003. McClellan Air Force Base (currently McClellan Park) was named in praise of test pilot Hezekiah McClellan.
According to the United States Census Bureau, the CDP covers an Place of 4.1 square miles (10.5 km²), all of it land. Its closest neighbor is North Highlands.

The 2010 United States Census reported that McClellan Park had a population of 743. The population density was 183.4 inhabitants per square mile (70.8/km²). The racial makeup of McClellan Park was 467 (62.9%) White, 99 (13.3%) African American, 13 (1.7%) Native American, 27 (3.6%) Asian, 21 (2.8%) Pacific Islander, 31 (4.2%) from additional races, and 85 (11.4%) from two or more races. Hispanic or Latino of any race were 110 persons (14.8%).

The Census reported that 541 people (72.8% of the population) lived in households, 202 (27.2%) lived in non-institutionalized help quarters, and 0 (0%) were institutionalized.

There were 194 households, out of which 116 (59.8%) had children under the age of 18 perky in them, 42 (21.6%) were opposite-sex married couples blooming together, 87 (44.8%) had a female householder afterward no husband present, 16 (8.2%) had a male householder next no wife present. There were 19 (9.8%) unmarried opposite-sex partnerships, and 3 (1.5%) same-sex married couples or partnerships. 39 households (20.1%) were made taking place of individuals, and 2 (1.0%) had someone full of beans alone who was 65 years of age or older. The average household size was 2.79. There were 145 families (74.7% of all households); the average relations size was 3.20.