Gardena, CA has a population of 59,898 and is the 648th largest city in the United States. The population density is 10,276 per sq mi which is 4322% higher than the California average and 11242% higher than the national average. The median age in Gardena is 40 which is approximately 11% higher than the California average of 36. In Gardena, 52% of the population over 15 years of age are married, 48% speak English and 31% speak Spanish. 52% of Gardena residents were born in California, 13% were born out of state, 1% were born outside of the United States and 33% were foreign born.