Oak Grove, Cass County
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| City | Oak Grove |
| State | Illinois (IL) |
| County | Cass |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 40.019493 |
| Longitude | -90.414569 |
| Density | N/A /km² |
| Incorporated | N/A |
| ZIP Code(s) | 62618, 60048, 61264 |
| Area Code | 312, 773, 847, 224 |
| County Seat | Virginia |
| School District | Sherrard Community Unit School District 200 |
Oak Grove is a locality in Cass County, Illinois, United States. Oak Grove is located at 40.0195°N, 90.4146°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 61264.
Oak Grove unfolds across the rolling terrain of Cass County, Illinois, a place where the land itself seems to exhale the scent of fertile soil and distant hayfields. It lies 43.5 miles west-north-west of Springfield, IL (from Springfield, IL: bearing 290°T), and is situated 0.5 miles east-north-east of Beardstown. The landscape here is a gentle succession of broad, rounded hills that slope away into fertile valleys, the kind of terrain that invites the eye to wander and the spirit to settle. Ancient oaks, their limbs spread wide like patriarchs, stand sentinel over fields of corn and soybeans, their leaves a vibrant green under the wide Midwestern sky. Small creeks, their banks often soft with moss, meander through the land, catching the sunlight in fleeting glints as they make their way towards larger waterways. The air, especially in the late afternoon, carries a certain stillness, a quiet hum of life that is as much felt as heard. The history of Oak Grove is deeply entwined with the agricultural bounty of this region, a story told in the weathered barns and the enduring legacy of farming families. For generations, the rich prairie soil has been the lifeblood of Oak Grove, supporting a local economy built on the cultivation of crops and the raising of livestock. While large-scale industry has largely bypassed this quiet corner of Illinois, a strong sense of self-reliance and community persists, a characteristic that has weathered economic shifts and demographic changes. The annual county fair, a time for neighborly competition and shared celebration, remains a touchstone for the cultural character of Oak Grove, a reminder of its enduring roots.
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This page provides an embedded street and satellite map of Oak Grove, Illinois — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 40.019493, -90.414569. 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 Oak Grove and Cass County.
Detailed location data for Oak Grove includes the ZIP code (62618), telephone area code (312, 773, 847, 224), county seat of Cass County (Virginia), and school district assignment (Sherrard Community Unit School District 200). 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 Oak Grove 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. |