Columbia, SD has a population of 149 and is the 25,675th largest city in the United States. The population density is 98 per sq mi which is 809% higher than the South Dakota average and 8% higher than the national average. The median age in Columbia is 44 which is approximately 18% higher than the South Dakota average of 37. In Columbia, 54% of the population over 15 years of age are married, 97% speak English and 0% speak Spanish. 70% of Columbia residents were born in South Dakota, 29% were born out of state, 0% were born outside of the United States and 1% were foreign born.