Explore Colchester, Illinois, with this interactive street and satellite map. You can “grab” the Colchester, IL street map and move it around to re-centre it. You can change between standard map view and satellite map view by clicking the small square in the bottom left-hand corner of the map. You can use the zoom buttons on the lower right side of the map to zoom in or out to street-level detail. You will find live weather, local and world news below.
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| City | Colchester |
| State | Illinois (IL) |
| County | McDonough |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 40.426431 |
| Longitude | -90.792632 |
| Population | 1,128 |
| Density | 354.8 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 62326 |
| Area Code | 217 |
| County Seat | Macomb |
| School District | West Prairie Community Unit School District 103 |
Colchester is a locality in McDonough County, Illinois, United States. It has a population of approximately 1,128. The population density is 354.8 people per km². Colchester is located at 40.4264°N, 90.7926°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 62326.
Colchester, a quiet sentinel in the western Illinois landscape, rests where the land begins its gentle, rolling descent towards the Mississippi. It lies 42.3 miles south-south-west of Galesburg, IL (from Galesburg, IL: bearing 212°T), and is situated 6.7 miles west-south-west of Macomb. The sky here is a vast canvas, often painted with the soft, bruised purples of approaching storms or the clear, piercing blue of a midsummer day. Fields of corn and soybeans stretch towards the horizon, their green a vibrant contrast to the rich, dark earth that yields their bounty. The air, especially in the early morning, carries the clean, damp scent of dew-kissed soil and the faint, sweet perfume of wild clover. Old oak trees, their branches gnarled like ancient hands, stand guard along the edges of farmsteads, their leaves rustling with secrets of seasons past. The story of Colchester is deeply entwined with the earth beneath it, first shaped by the agricultural endeavors of settlers drawn to its fertile plains. For a time, the coal mines burrowed into the surrounding hillsides, leaving a subtle, almost forgotten scar on the landscape and a lingering echo in the town’s collective memory. Though the mines are long silent, the spirit of hard work and self-reliance persists, a quiet hum beneath the surface of everyday life. The local economy, like the land itself, is rooted in agriculture, with farmers tending their crops and livestock, their lives measured by the turning of the seasons. Colchester maintains a dignified, unhurried pace, a place where the clatter of a passing train can momentarily interrupt the stillness, a reminder of connections to the wider world.
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This page provides an embedded street and satellite map of Colchester, Illinois — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 40.426431, -90.792632. 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 Colchester and McDonough County.
Detailed location data for Colchester includes the ZIP code (62326), telephone area code (217), county seat of McDonough County (Macomb), and school district assignment (West Prairie Community Unit School District 103). 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 Colchester 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. |