Cupertino, CA has a population of 60,297 and is the 641st largest city in the United States. The population density is 5,331 per sq mi which is 2194% higher than the California average and 5784% higher than the national average. The median age in Cupertino is 41 which is approximately 13% higher than the California average of 36. In Cupertino, 72% of the population over 15 years of age are married, 37% speak English and 3% speak Spanish. 33% of Cupertino residents were born in California, 14% were born out of state, 1% were born outside of the United States and 52% were foreign born.