Gonzales, CA has a population of 8,401 and is the 4,520th largest city in the United States. The population density is 4,444 per sq mi which is 1812% higher than the California average and 4805% higher than the national average. The median age in Gonzales is 28 which is approximately 23% lower than the California average of 36. In Gonzales, 55% of the population over 15 years of age are married, 24% speak English and 76% speak Spanish. 61% of Gonzales residents were born in California, 4% were born out of state, 2% were born outside of the United States and 34% were foreign born.