Erwin, SD is a small city located in Moody County. It has a population of 57233 and one of its main attractions is the Sioux River. A two bedroom rental in Erwin costs $900, which is much lower than the US average of $1,430. Additionally, groceries are cheaper in Erwin as well with a grocery cost index of 95 compared to 100 in the US. There are many local companies and attractions located in Erwin such as Family Dollar Store, Pipe Dreams Smoke Shop, and Main Street Auto Repair. Residents also enjoy spending time at the Sioux Park Zoo and nearby fishing spots on the Sioux River.