Pico Rivera, CA has a population of 63,724 and is the 587th largest city in the United States. The population density is 7,682 per sq mi which is 2901% higher than the California average and 8379% higher than the national average. The median age in Pico Rivera is 36 which is approximately 1% lower than the California average of 36. In Pico Rivera, 50% of the population over 15 years of age are married, 29% speak English and 68% speak Spanish. 63% of Pico Rivera residents were born in California, 4% were born out of state, 1% were born outside of the United States and 32% were foreign born.