Explore St. Clair, Missouri, with this interactive street and satellite map. You can “grab” the St. Clair, MO 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 | St. Clair |
| State | Missouri (MO) |
| County | Franklin |
| Country | United States of America |
| Timezone | Central Time (America/Chicago) |
| Latitude | 38.345329 |
| Longitude | -90.980974 |
| Population | 4,789 |
| Density | 381.9 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 63077 |
| Area Code | 314 |
| County Seat | Union |
| School District | St. Clair R-XIII School District |
St. Clair is a locality in Franklin County, Missouri, United States. It has a population of approximately 4,789. The population density is 381.9 people per km². St. Clair is located at 38.3453°N, 90.9810°W. It observes the Central Time (America/Chicago) timezone. ZIP code: 63077.
St. Clair rests in a landscape where the Ozark foothills begin to soften, a place where the Meramec River, a ribbon of cool, flowing water, has patiently shaped the terrain over millennia. It lies 23.8 miles south-west of Wildwood, MO (from Wildwood, MO: bearing 226°T), and is situated 7.4 miles south-south-east of Union. Rolling hills, cloaked in a dense tapestry of oak and hickory, cradle the town, their slopes descending into fertile valleys. The air here, especially in the early morning, carries the damp, earthy scent of the forest floor, mingling with the fainter, sweeter perfume of wild honeysuckle that often spills over fences in the warmer months. The land itself feels ancient, a quiet witness to the passage of seasons, its geological bones hinting at a deeper, more rugged past beneath the verdant surface. The origins of St. Clair are tied to the fertile banks of the Meramec and the burgeoning railroad lines that once promised connection and commerce. Historically, agriculture and timber played significant roles in its economy, the rich soil yielding crops and the abundant forests providing sustenance and building materials. Today, while still possessing a strong connection to its rural roots, St. Clair has diversified, with small businesses and a growing residential base contributing to its character. The Meramec River remains a central, life-giving feature, offering opportunities for recreation and a constant reminder of the natural forces that have sculpted this corner of Franklin County.
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This page provides an embedded street and satellite map of St. Clair, Missouri — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 38.345329, -90.980974. 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. Clair and Franklin County.
Detailed location data for St. Clair includes the ZIP code (63077), telephone area code (314), county seat of Franklin County (Union), and school district assignment (St. Clair R-XIII School District). 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. Clair 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. |