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| City | Old Jefferson |
| State | Louisiana (LA) |
| County | East Baton Rouge Parish |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 30.382692 |
| Longitude | -91.017047 |
| Population | 7,860 |
| Density | 854.6 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 70817 |
| Area Code | 985 |
Old Jefferson is a locality in East Baton Rouge Parish, Louisiana, United States. It has a population of approximately 7,860. The population density is 854.6 people per km². Old Jefferson is located at 30.3827°N, 91.0170°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 70817.
Old Jefferson lies low and languid beneath the broad Louisiana sky, a place where the air itself seems to carry the scent of damp earth and slow-moving water. It lies 6.1 miles north-north-west of Prairieville, LA (from Prairieville, LA: bearing 334°T), and is situated 9.4 miles east-south-east of Baton Rouge. The landscape here is a gentle embrace of alluvial plains, the land softened by centuries of Mississippi River sediment, creating a terrain that slopes imperceptibly towards the water’s edge. Stately live oaks, draped in Spanish moss like ancient, contemplative elders, cast dappled shadows across the scattered homes and properties, their gnarled branches reaching out as if to hold the very essence of this humid, verdant territory. The roads, often lined with a dense growth of palmettos and tenacious wildflowers, curve rather than cut, following the natural contours of the land, and the quiet hum of cicadas is a constant companion, a sonic signature of the deep South’s summer heat. The history of Old Jefferson is inextricably bound to the mighty Mississippi, its fertile banks a magnet for those seeking to cultivate the land, and the echoes of those early agricultural ambitions still resonate. While much of the surrounding area now buzzes with the energy of Baton Rouge, Old Jefferson retains a more measured pace, a place where the past is not so much a monument as a subtle undercurrent in the daily lives of its residents. The local economy, once dominated by the agricultural bounty of sugar cane and cotton, has diversified, but the connection to the land remains, evident in the small farms and gardens that dot the landscape, and the occasional scent of woodsmoke drifting from chimneys. It’s a locality that feels lived-in, where the passage of time is marked not by grand pronouncements, but by the gradual weathering of barns, the slow growth of trees, and the enduring warmth of its people.
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This page provides an embedded street and satellite map of Old Jefferson, Louisiana — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 30.382692, -91.017047. 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 Old Jefferson and East Baton Rouge Parish.
Detailed location data for Old Jefferson includes the ZIP code (70817), telephone area code (985), county seat of East Baton Rouge Parish, and school district assignment. 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 Old Jefferson 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. |