Alton is located in Sioux County, IA. The population is 1,073, making Alton the 7th largest city in Sioux County.
There are 1 public schools in Alton with an average Homefacts rating of A. The total crime rate for Alton is low , and there are 1 registered sex offenders residing in the city. Unemployment in Alton is low and the median home sales price is $0. Detailed and up-to-date Alton property reports are available for any property address.
Cities near Alton include Nassau Township, Orange City and Holland Township.