St. Clair County lies in west-central Missouri, where Osceola provides the clearest administrative and road reference. Appleton City sits near the northwestern corner, Lowry City is north of Osceola, and Roscoe, Collins, and Vista mark smaller communities across the south and southwest. Route 13 crosses the county north-south, U.S. 54 organizes the southern corridor, and Harry S Truman Reservoir reaches deeply into the northeast. High-resolution map files are available for download in the section below.
This page separates those features into a general county map, a ranked city map, a terrain-and-water map, and an elevation map. High-resolution JPG originals of all four can be downloaded together in one ZIP for enlargement, A3 printing, classroom materials, reports, or personal reference.
Table of Contents
Osceola and Route 13 provide the county’s clearest road framework
Osceola sits slightly east of the county’s center and is the easiest place to begin reading the general map. Route 13 passes through the area from north to south, while Route 82 approaches from the southwest near Roscoe. The Missouri Association of Counties lists many St. Clair County offices in Osceola, reinforcing the town’s role as the county’s administrative reference.
Following Route 13 north leads toward Lowry City and eventually Henry County. South of Osceola, the highway reaches the U.S. 54 corridor, which forms the strongest east-west reference in the lower county. Missouri Department of Transportation county mapping also identifies Routes 13 and 82 and U.S. 54 as prominent state-system roads.
Appleton City lies near the northwestern edge, where rural roads and stream valleys occupy much more space than the urban footprint. Roscoe helps identify the southwestern Route 82 side, while Vista lies southeast of Osceola and Collins marks the southern extension. The settlements are widely spaced, so roads and rivers are especially useful for orientation between them.
The county outline is also distinctive. Truman Reservoir and its river valleys create a complicated northeastern edge, while a more rectangular projection extends southward. Comparing that shape with neighboring Henry, Hickory, Benton, Polk, Cedar, Vernon, and Bates counties helps make the county easy to recognize on the regional map.
Appleton City, Osceola, and Lowry City lead a widely spaced settlement pattern
The city map highlights Appleton City, Osceola, Lowry City, Roscoe, Collins, and Vista. The map index labels Appleton City with 1,221, Osceola with 1,062, Lowry City with 618, Roscoe with 101, Collins with 76, and Vista with 46. Appleton City and Osceola are therefore much larger on the index than the smaller southern communities.
Their positions spread across the county rather than forming one urban corridor. Appleton City is near the northwest corner, Lowry City sits north-central, and Osceola lies farther southeast. Roscoe marks the southwest, Vista lies southeast of Osceola, and Collins provides a reference within the southern projection.
Osceola is the county-seat reference even though Appleton City is slightly larger on the map index. Lowry City is particularly useful for locating the Route 13 corridor west of the Truman Reservoir system. Roscoe, Collins, and Vista help orient the sparsely settled southern half, where streams and ridges dominate the map more than urban development.
The general map also shows nearby places outside the county, including Rockville, Schell City, El Dorado Springs, and Weaubleau. The six-city view should therefore be treated as a quick internal orientation layer rather than a complete list of settlements in and around St. Clair County.
Truman Reservoir, Osage River, and Sac River shape the main valleys
Harry S Truman Reservoir is the most visually dominant water feature, extending deeply into northeastern St. Clair County and creating a highly irregular shoreline and county edge. The Osage River crosses the central county in a series of broad bends before connecting with the reservoir system. Beers Lake provides another useful landmark east of the central Osage corridor.
The Sac River occupies the southern and south-central part of the terrain map. Brush Creek cuts the southern extension, while Weaubleau Creek and Coon Creek organize valleys farther east and southeast. These streams create distinct low corridors between much higher ridges, a relationship that becomes especially clear on the elevation map.
Northwestern St. Clair County contains the Monegaw Creek system. Monegaw Creek and Little Monegaw Creek cross the uplands, with Rocky Creek lying between them. Decoy Lake, Clear Creek, and Baker Branch provide additional western references away from the major reservoir and river channels.
The terrain-and-water map is intended for geographic reference rather than current lake level, flood status, navigation, property boundaries, or legal water boundaries. Conditions on Truman Reservoir and the Osage and Sac rivers can change, so present-day water or recreation decisions should rely on current official information.
Elevation ranges from about 202 to 325 meters
The elevation map reports an actual range of roughly 202 to 325 meters and a mean near 251 meters. The lowest dark-green corridors follow Truman Reservoir, the Osage River, and the Sac River. Around the broad central river bends, lower terrain widens noticeably between surrounding ridges.
Higher tan and brown terrain becomes especially prominent in the east, southeast, and parts of the southern projection. Short tributaries cut deeply into these uplands, producing a closely spaced ridge-and-valley pattern. Near the northeastern reservoir edge, high ground and low water corridors can sit very close together.
The western and northwestern county appears somewhat gentler overall, but Monegaw Creek, Clear Creek, and many smaller tributaries still carve distinct lower valleys. Osceola also sits close to river-cut terrain rather than on an entirely flat surface. Comparing the water and elevation maps shows that the named rivers and creeks closely match the green lower corridors.
This county-scale elevation surface is useful for broad relief comparison, not for engineering, construction, drainage design, parcel-level elevation decisions, or survey-grade measurement. Site-specific work requires more detailed official elevation data or field surveying.
Use Osceola, Truman Reservoir, and the river valleys as reference layers
Start with Osceola and Route 13 when roads and settlements matter most. Lowry City lies to the north, Appleton City anchors the northwest, and Roscoe provides a southwestern reference. U.S. 54 and Route 82 then organize the main southern and southwestern travel directions.
For terrain, begin with Truman Reservoir and the Osage River, then compare the Sac River, Monegaw Creek, and Weaubleau Creek. Moving to the elevation map shows how these waterways occupy lower green corridors while higher ridges become more extensive across the east and south.
St. Clair County is shaped less by a dense urban network than by a combination of small towns, rural highways, a major reservoir, and strongly dissected river country. The irregular northeastern boundary and the wide Osage River bends are especially useful features for recognizing the county on a map.
The downloadable JPG originals contain more pixels than the WebP previews embedded on the page, making them better for enlargement, A3 printing, classroom handouts, reports, and personal reference. They remain general-purpose maps, however. Legal boundaries, property ownership, live road restrictions, current water conditions, and precise site elevations should always be checked against the appropriate current official source.
Frequently Asked Questions
Which roads are the easiest references in St. Clair County?
Route 13 is the clearest starting point because it links Lowry City and Osceola before reaching U.S. 54 in the south. Route 82 provides another useful reference toward Roscoe and the southwestern side.
Where are Truman Reservoir and the Osage River on the map?
Harry S Truman Reservoir extends into the northeastern county, while the Osage River bends across the central area and connects into the reservoir system. Both occupy broad low corridors on the elevation map.
How much elevation change is shown across St. Clair County?
The elevation map shows an actual range of about 202 to 325 meters with a mean near 251 meters. River and reservoir valleys are lowest, while eastern, southeastern, and southern ridges rise substantially higher.
Map File Information
The download ZIP contains high-resolution JPG versions of the St. Clair County general map, city map, terrain-and-water map, and elevation map.
- File Type: JPG
Related Maps
Sources and References
Boundary and road reference data are supported by U.S. Census Bureau TIGER/Line, water features by USGS National Hydrography, and elevation data by the USGS 3D Elevation Program. County office information in Osceola is available from the Missouri Association of Counties St. Clair County page, while state-road context is available from the Missouri Department of Transportation St. Clair County map.
Green Map creates custom-edited map images using open geographic data sources such as geoBoundaries, Natural Earth, OpenStreetMap, and government open data. These maps are edited visual materials, not raw data files, and are provided for education, documents, presentations, and graphic reference.
