Estelline, SD has a population of 882 and is the 15,926th largest city in the United States. The population density is 933 per sq mi which is 8530% higher than the South Dakota average and 930% higher than the national average. The median age in Estelline is 40 which is approximately 8% higher than the South Dakota average of 37. In Estelline, 60% of the population over 15 years of age are married, 90% speak English and 10% speak Spanish. 62% of Estelline residents were born in South Dakota, 30% were born out of state, 1% were born outside of the United States and 8% were foreign born.