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| City | St. Jacob |
| State | Illinois (IL) |
| County | Madison |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 38.713937 |
| Longitude | -89.76815 |
| Population | 1,759 |
| Density | 737.5 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 62281, 62249 |
| Area Code | 217 |
| County Seat | Edwardsville |
| School District | Triad Community Unit School District 2 |
St. Jacob is a locality in Madison County, Illinois, United States. It has a population of approximately 1,759. The population density is 737.5 people per km². St. Jacob is located at 38.7139°N, 89.7682°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 62249.
St. Jacob sits in a landscape that breathes with the slow, steady pulse of the American Midwest. It lies 11.4 miles north-east of O'Fallon, IL (from O'Fallon, IL: bearing 43°T), and is situated 6.3 miles east of Troy. Rolling hills, softened by decades of cultivation, give way to flatter expanses where corn and soybeans stretch towards the horizon, a verdant quilt stitched with the silver threads of drainage ditches. The air here, especially in the late afternoon, carries a scent of turned earth and drying stalks, a fragrance that clings to everything, mingling with the faint, sweet perfume of honeysuckle that often spills over weathered fences. On clear evenings, the sky above St. Jacob becomes a vast canvas, painted with hues of apricot and lavender, the stars emerging with a clarity rarely seen in more populated climes, each one a tiny, sharp pinprick against the deepening indigo. The roots of St. Jacob run deep into the rich soil, tracing back to an era when pioneers carved their livelihoods from this fertile ground. Its economy, for generations, has been intrinsically tied to agriculture, a cyclical dance of planting and harvest that dictates the rhythm of life. While the land still yields its bounty, the economic character of St. Jacob has broadened, embracing small businesses that serve the needs of its residents and attract visitors seeking a quieter pace. The nearby presence of larger metropolitan centers offers a convenient counterpoint, drawing some of its workforce while allowing St. Jacob to retain its distinct, unhurried charm, a place where neighborly waves are still a common currency.
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This page provides an embedded street and satellite map of St. Jacob, Illinois — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 38.713937, -89.76815. 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 St. Jacob and Madison County.
Detailed location data for St. Jacob includes the ZIP code (62281), telephone area code (217), county seat of Madison County (Edwardsville), and school district assignment (Triad Community Unit School District 2). 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 St. Jacob 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. |