Santa Clara, CA has a population of 122,725 and is the 226th largest city in the United States. The population density is 6,667 per sq mi which is 2769% higher than the California average and 7258% higher than the national average. The median age in Santa Clara is 34 which is approximately 5% lower than the California average of 36. In Santa Clara, 56% of the population over 15 years of age are married, 48% speak English and 12% speak Spanish. 41% of Santa Clara residents were born in California, 15% were born out of state, 2% were born outside of the United States and 42% were foreign born.