Greenacres, CA has a population of 4,737 and is the 6,694th largest city in the United States. The population density is 2,488 per sq mi which is 971% higher than the California average and 2646% higher than the national average. The median age in Greenacres is 43 which is approximately 20% higher than the California average of 36. In Greenacres, 65% of the population over 15 years of age are married, 93% speak English and 7% speak Spanish. 73% of Greenacres residents were born in California, 23% were born out of state, 1% were born outside of the United States and 3% were foreign born.