Commerce, CA has a population of 12,997 and is the 3,213th largest city in the United States. The population density is 1,988 per sq mi which is 755% higher than the California average and 2094% higher than the national average. The median age in Commerce is 34 which is approximately 5% lower than the California average of 36. In Commerce, 47% of the population over 15 years of age are married, 24% speak English and 75% speak Spanish. 62% of Commerce residents were born in California, 5% were born out of state, 1% were born outside of the United States and 33% were foreign born.