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| City | Hardin |
| State | Illinois (IL) |
| County | Calhoun |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 39.156715 |
| Longitude | -90.6179 |
| Population | 663 |
| Density | 143.7 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 62047 |
| Area Code | 309 |
| County Seat | Hardin |
| School District | Calhoun Community Unit School District 40 |
Hardin is a locality in Calhoun County, Illinois, United States. It is a small community with a population of 663. The population density is 143.7 people per km². Hardin is located at 39.1567°N, 90.6179°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 62047.
Hardin, a small settlement in Calhoun County, unfolds itself across a landscape where the rich, dark earth meets the broad, slow sweep of the Illinois River. It lies 24.3 miles north of OFallon, MO (from OFallon, MO: bearing 10°T), and is situated 8.8 miles east of Elsberry. The terrain here is a study in gentle slopes and fertile bottoms, cradled by bluffs that rise in soft, wooded waves, their surfaces often softened by the haze of summer or the muted tones of autumn. Fields of corn and soybeans stretch out like rumpled blankets, their green and gold hues a testament to the abundant soil, while the river, a constant, silvery presence, dictates the very breath of the place, its currents carrying the whisper of distant shores. The air itself often carries a faint, earthy scent, a mingling of ripening crops and damp riverbank, a perfume unique to this quiet corner of the world. The story of Hardin is intrinsically tied to the river that defines its western edge, a lifeline that has shaped its economy and its people for generations. Historically, steamboats once plied these waters, bringing goods and travelers, and while that era has largely passed, the river's influence persists through agriculture, the bedrock of Hardin's livelihood. Local farmers, their hands calloused by the earth, cultivate crops that feed the nation, their prosperity a direct reflection of the land's bounty. Small businesses dot the main street, their storefronts bearing the patina of time and steady trade, offering a glimpse into the unhurried pace of everyday life. Though no grand monuments mark its existence, Hardin holds a quiet dignity, a place where the rhythm of the seasons and the flow of the river are the most compelling narratives.
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This page provides an embedded street and satellite map of Hardin, Illinois — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 39.156715, -90.6179. 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 Hardin and Calhoun County.
Detailed location data for Hardin includes the ZIP code (62047), telephone area code (309), county seat of Calhoun County (Hardin), and school district assignment (Calhoun Community Unit School District 40). 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 Hardin 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. |