Gonzales, LA has a population of 10,492 and is the 3,806th largest city in the United States. The population density is 1,150 per sq mi which is 1196% higher than the Louisiana average and 1169% higher than the national average. The median age in Gonzales is 38 which is approximately 4% higher than the Louisiana average of 36. In Gonzales, 53% of the population over 15 years of age are married, 91% speak English and 6% speak Spanish. 79% of Gonzales residents were born in Louisiana, 16% were born out of state, 0% were born outside of the United States and 5% were foreign born.