Loomis, CA has a population of 6,690 and is the 5,341st largest city in the United States. The population density is 921 per sq mi which is 296% higher than the California average and 916% higher than the national average. The median age in Loomis is 42 which is approximately 16% higher than the California average of 36. In Loomis, 56% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 71% of Loomis residents were born in California, 26% were born out of state, 1% were born outside of the United States and 1% were foreign born.