Worthing, SD has a population of 1,066 and is the 14,755th largest city in the United States. The population density is 1,900 per sq mi which is 17479% higher than the South Dakota average and 1997% higher than the national average. The median age in Worthing is 31 which is approximately 15% lower than the South Dakota average of 37. In Worthing, 59% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 71% of Worthing 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.