Explore O'Fallon, Illinois, with this interactive street and satellite map. You can “grab” the O'Fallon, 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 | O'Fallon |
| State | Illinois (IL) |
| County | St. Clair |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 38.592272 |
| Longitude | -89.911212 |
| Population | 32,262 |
| Density | 785.2 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 62269 |
| Area Code | 217 |
| County Seat | Belleville |
| School District | O'Fallon Township High School District 203 |
O'Fallon is a locality in St. Clair County, Illinois, United States. It has a population of 32,262. The population density is 785.2 people per km². O'Fallon is located at 38.5923°N, 89.9112°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 62269.
O'Fallon unfolds across a landscape of gentle, fertile plains, where the horizon stretches wide under a sky that often seems to hold its breath before a storm. The land here, a rich, dark loam, whispers of the agricultural bounty it has sustained for generations, its contours softened by rolling fields and the occasional stand of mature oak and maple trees. As the sun dips, it casts a warm, amber glow across the western edges of O'Fallon, painting the scattered farmsteads and the newer residential developments in a quiet, enduring light. The air, especially in the late afternoon, carries a faint, earthy scent, a mingling of freshly turned soil and the distant hum of life. The roots of O'Fallon run deep, tracing back to the pioneering spirit that first settled these Illinois prairies, drawn by the promise of fertile land and westward expansion. While its origins are agricultural, O'Fallon has steadily grown, its economy now a blend of commerce, industry, and the continuing legacy of farming that shapes the surrounding countryside. The town serves as a vital hub for the region, its streets alive with the daily commerce of families and businesses, a steady pulse that belies its tranquil appearance. Distinctive among its neighbors, O'Fallon has cultivated a character of pragmatic optimism, a place where the past is honored but the future is actively built, a characteristic reflected in its well-maintained parks and the vibrant community events that punctuate the year.
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This page provides an embedded street and satellite map of O'Fallon, Illinois — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 38.592272, -89.911212. 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 O'Fallon and St. Clair County.
Detailed location data for O'Fallon includes the ZIP code (62269), telephone area code (217), county seat of St. Clair County (Belleville), and school district assignment (O'Fallon Township High School District 203). 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 O'Fallon 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. |