South Bend, IN has a population of 101,037 and is the 308th largest city in the United States. The population density is 2,433 per sq mi which is 1255% higher than the Indiana average and 2585% higher than the national average. The median age in South Bend is 33 which is approximately 11% lower than the Indiana average of 37. In South Bend, 44% of the population over 15 years of age are married, 85% speak English and 11% speak Spanish. 61% of South Bend residents were born in Indiana, 30% were born out of state, 1% were born outside of the United States and 9% were foreign born.