Carlsbad, CA has a population of 112,008 and is the 254th largest city in the United States. The population density is 2,968 per sq mi which is 1177% higher than the California average and 3176% higher than the national average. The median age in Carlsbad is 42 which is approximately 18% higher than the California average of 36. In Carlsbad, 61% of the population over 15 years of age are married, 82% speak English and 9% speak Spanish. 47% of Carlsbad residents were born in California, 36% were born out of state, 2% were born outside of the United States and 15% were foreign born.