Alton Map
Alton is a city in Sioux County, Iowa, United States, along the Floyd River. As of the 2000 census, the city population was 1,095.
Alton is located at 42°59?13?N 96°00?41?W / 42.986906°N 96.011314°W / 42.986906; -96.011314 (42.986906, -96.011314).
According to the United States Census Bureau, the city has a total area of 1.5 square miles (3.9 km2), all of it land.
Nearby cities include Sioux Center, Remsen, Boyden, Hull, Marcus.