Wetonka, SD has a population of 3 and is the 29,078th largest city in the United States. The population density is 12 per sq mi which is 13% higher than the South Dakota average and 87% lower than the national average. The median age in Wetonka is 50 which is approximately 35% higher than the South Dakota average of 37. In Wetonka, 67% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 100% of Wetonka residents were born in South Dakota, 0% were born out of state, 0% were born outside of the United States and 0% were foreign born.