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Madison County, Illinois locator map According to the United States Census Bureau, Alton is a City that is located in Madison County, Illinois at 38.89 degrees North and 90.18 degrees West.  The city's time zone is America/Chicago, and the city's primary telephone area code is 618.  The land area of Alton is about 15.47 square miles, whereas the water area of the city is about 1.27 square miles.  Madison County's land area is about 716 square miles, so the city occupies about 2.2 percent of the county's total land area.

The Census Bureau estimates that Alton had about 26,208 residents in 2019, which is approximately 1,694 people per square mile of land area. 

According to recent American Community Survey data, the median household income in Alton was about $40,211 per year. 

The Illinois counties map at upper right shows Madison County, highlighted in red.  Use the menu below to display interactive maps of Alton, either in a frame on this page or in full-screen mode. 

Use the menu below to display categorized Alton directories. 

Alton Directory Page: Home Improvement

Selected Alton, Illinois Listings

These Alton listings in zipcode 62002 provide a window into the city's cultural environment and economic climate.

Abbott Machine Co
  • Industrial Equipment & Supplies Dealers
  • Government Contractors
  • Metal Forming Machinery
Alton Steel Inc
  • Metal Products
  • Metal Products Wholesale & Manufacturers
Atlantis Pools
  • Swimming Pool & Spa Construction & Contractors
  • Swimming Pool Dealers
  • Spa & Hot Tub Dealers
  • Swimming Pool Equipment & Supplies Dealers
Career Alternatives Learning Center
  • Colleges & Universities
  • Vocational Education
  • Business Education
  • Computer Technology Schools
Dicks Flowers Inc
  • Florists
  • Advertising & Promotional Gifts
  • Collectible Gifts
  • Anniversary Gifts
Gentelins On Broadway
  • Steak Restaurants
Hanley Industries Inc
  • Government Contractors
  • Chemicals - Manufacturers
  • Explosives
Lyons Glass CO
  • Auto Glass Retail
Metroplex Communications Inc
  • Radio Stations
  • Communications Services
PAC Freight INC
  • Trucking Companies
  • Freight Forwarding
Roberts Ford-Chrysler-Jeep
  • Auto Dealers
Spencer T Olin Golf Course
  • Outdoor Sports & Recreation
  • Public Golf Courses
  • Golf
  • Golf Courses
Stutz Excavating Inc
  • Government Contractors
  • Trucking Companies
  • Excavation Contractors
  • Freight Forwarding

Nearby Illinois Cities and Towns *

* Parenthesized numbers indicate economic activity levels.

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