Winfred, SD has a population of 45 and is the 28,278th largest city in the United States. The population density is 45 per sq mi which is 319% higher than the South Dakota average and 50% lower than the national average. The median age in Winfred is 53 which is approximately 45% higher than the South Dakota average of 37. In Winfred, 92% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 58% of Winfred residents were born in South Dakota, 42% were born out of state, 0% were born outside of the United States and 0% were foreign born.