57660 is zip code located in Custer Township, South Dakota. The population is 65, making 57660 the largest zipcode in Custer Township and the 9th largest in Corson County.
There are 0 public schools in 57660 with an average Homefacts rating of NA. , and there are 0 registered sex offenders residing in the zip code 57660. Unemployment in 57660 is very high.