Valparaiso, IN has a population of 32,271 and is the 1,316th largest city in the United States. The population density is 1,984 per sq mi which is 1005% higher than the Indiana average and 2090% higher than the national average. The median age in Valparaiso is 34 which is approximately 10% lower than the Indiana average of 37. In Valparaiso, 48% of the population over 15 years of age are married, 93% speak English and 3% speak Spanish. 57% of Valparaiso residents were born in Indiana, 37% were born out of state, 1% were born outside of the United States and 5% were foreign born.