Aurora, IN has a population of 3,697 and is the 7,794th largest city in the United States. The population density is 1,123 per sq mi which is 526% higher than the Indiana average and 1140% higher than the national average. The median age in Aurora is 36 which is approximately 3% lower than the Indiana average of 37. In Aurora, 51% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 57% of Aurora residents were born in Indiana, 42% were born out of state, 0% were born outside of the United States and 1% were foreign born.