Elk Grove, CA has a population of 163,634 and is the 154th largest city in the United States. The population density is 3,886 per sq mi which is 1572% higher than the California average and 4189% higher than the national average. The median age in Elk Grove is 35 which is approximately 2% lower than the California average of 36. In Elk Grove, 59% of the population over 15 years of age are married, 66% speak English and 8% speak Spanish. 60% of Elk Grove residents were born in California, 16% were born out of state, 2% were born outside of the United States and 23% were foreign born.