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| City | Alton |
| State | Illinois (IL) |
| County | Madison |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 38.890604 |
| Longitude | -90.184276 |
| Population | 80,162 |
| Density | 626.6 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 62002, 62018 |
| Area Code | 309 |
| County Seat | Edwardsville |
| School District | Alton Community Unit School District 11 |
Alton is a locality in Madison County, Illinois, United States. It has a population of 80,162. The population density is 626.6 people per km². Alton is located at 38.8906°N, 90.1843°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 62018.
Alton rises from the Mississippi River's embrace, a place where the broad, muddy current dictates the very breath of the land. It lies 10.2 miles north-east of Florissant, MO (from Florissant, MO: bearing 47°T), and is situated 6.5 miles east-north-east of Old Jamestown. Bluffs, worn smooth by centuries of wind and water, stand sentinel over the riverfront, their limestone faces catching the sun in hues of ochre and pale grey. The air here carries a peculiar dampness, a constant whisper of the vast river that flows ever onward, its presence a palpable force shaping the terrain and the very spirit of the place. Beyond the river's immediate reach, the land rolls gently, a mosaic of cultivated fields and stands of oak and hickory, hinting at the agricultural heart that beats beneath the surface. The history of Alton is deeply etched into its very bones, a narrative of industry and resilience woven from threads of steamboat trade and quarrying. For generations, the limestone extracted from its iconic bluffs provided the building blocks for countless structures, a testament to the enduring strength of the earth and the labor of its people. This riverine heritage, marked by the ebb and flow of commerce on the Mississippi, has shaped Alton's economy, fostering a character that is both sturdy and adaptable, forever tied to the lifeblood of the waterway. The ghosts of its past linger in the weathered brick of its older buildings and the quiet dignity of its mature neighborhoods, a continuous dialogue between yesterday and today.
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This page provides an embedded street and satellite map of Alton, Illinois — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 38.890604, -90.184276. Live weather conditions are sourced directly from the National Weather Service, with current observations and a 7-day forecast also powered by Open-Meteo. Real-time local news and world news feeds keep the page current, while a Wikipedia summary or an editorially written description provides background on Alton and Madison County.
Detailed location data for Alton includes the ZIP code (62002), telephone area code (309), county seat of Madison County (Edwardsville), and school district assignment (Alton Community Unit School District 11). These are among the most commonly searched location details for any US city or town.
Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity — ensuring the correct Alton is identified even where the name is shared across multiple counties or states. Population figures are sourced from the 2020 US Census.
| Page generated | July 2026 |
| Location data | SimpleMaps US Cities Database; coordinates matched to USGS GNIS definitive data |
| Wikipedia validation | Article content matched to USGS GNIS coordinates via Wikipedia geosearch API. Location verified by proximity — not name matching alone. |