Aurora, SD has a population of 695 and is the 17,517th largest city in the United States. The population density is 1,457 per sq mi which is 13374% higher than the South Dakota average and 1508% higher than the national average. The median age in Aurora is 31 which is approximately 16% lower than the South Dakota average of 37. In Aurora, 60% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 69% of Aurora residents were born in South Dakota, 29% were born out of state, 1% were born outside of the United States and 1% were foreign born.