Miller, SD has a population of 1,527 and is the 12,586th largest city in the United States. The population density is 1,542 per sq mi which is 14166% higher than the South Dakota average and 1602% higher than the national average. The median age in Miller is 50 which is approximately 36% higher than the South Dakota average of 37. In Miller, 65% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 75% of Miller residents were born in South Dakota, 25% were born out of state, 0% were born outside of the United States and 0% were foreign born.