Alton is located in Illinois. Alton, Illinois 62002has a population of 26,342. Alton 62002 is less family-centric than the surrounding county with 25% households with children. The county percentage for households with children is 28%.
The median household income in Alton, Illinois 62002 is $42,389. The median household income for the surrounding county is $63,321 compared to the national median of $66,222. The median age of people living in Alton 62002 is 38.2 years.
The average high temperature in July is 88.1 degrees, with an average low temperature in January of 19.4 degrees. The annual precipitation is 38.54.