St. Clair Township, IL Elevation & Topographic Map
Elevation
630 ft 195 m590 ft 180 m560 ft 170 m520 ft 160 m470 ft 145 m450 ft 135 m
Contours every 100 ft, bold every 500 ft
USGS 3DEP · U.S. Census Bureau
How to use this mapviews, tools and data
- Elevation
- Ground colored by height from green (lowest) to white (highest), with contour lines every 40–500 ft (USGS data).
- Satellite
- A 2016 satellite photo at 33 ft (10 m) detail; contours off.
- 3D
- Tilt and turn the terrain; hills are raised 1.5×, or set ×1 for true height.
- Click or tap anywhere
- The exact elevation of that spot in ft and m.
- Measure
- Pick two points for the climb, descent and grade along a straight line.
- Township area
- Fades everything outside the official township boundaries (US Census).
Elevation Data
St. Clair Township sits at about 550 ft (165 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
550 ft 165 m
most residents: 510–590 ft
Lowest
450 ft 135 m
on the south side
Highest
630 ft 195 m
on the east side
Average
540 ft 165 m
all land inside township boundaries
St. Clair Township spans about 180 ft of height, so no single spot tells the whole story. The ruler shows where its people live, and where the other numbers you'll see come from.
| Figure | Elevation |
|---|---|
| Typical Where people live: half of residents higher, half lower | 550 ft165 m |
| Highest point Inside township boundaries, on the east side | 630 ft195 m |
| Lowest point Inside township boundaries, on the south side | 450 ft135 m |
| Airport (BLV) FAA airport elevation, the highest point of its runways, 5.1 mi east of the township boundaries | 459 ft140 m |
| Average of all land | 540 ft165 m |
Elevation profile, south to north
5.1 mi south to north through the middle of St. Clair Township.
Topographic Map
- Location
- Township in St. Clair County, Illinois, United States
- Population
- 35,560 2024 est.
- Land area
- 20.4 sq mi + 0.3 sq mi water
- Density
- 1,746 per sq mi
- Coordinates
- 38.5411° N, 89.9724° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Central Lowland
- Drains to
- Richland Creek → Mississippi River → Gulf of America
- Airport
- Scott Afb/Midamerica St Louis (BLV) 459 ft
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Sources: U.S. Census Bureau, USGS, FAA
Nearby Places
Nearby towns by typical elevation
- Fairview Heights580 ft
- Swansea570 ft
- St. Clair Township550 ft
- Shiloh550 ft
- Stookey Township550 ft
- O'Fallon550 ft
- O'Fallon Township540 ft
- Belleville530 ft
- Shiloh Valley Township470 ft
- Rentchler450 ft
- Scott AFB440 ft
Rankings by typical elevation
- Towns in Illinois2,242nd highest of 2,872
- Towns in St. Clair County6th highest of 50
Peaks and hills nearest, by height
- Clarks Mound677 ft
- Turkey Hill640 ft
- Winstanley Hill580 ft
- Monks Mound520 ft
- Rattlesnake Mound430 ft
How we measure
- Typical elevation: the population-weighted median: every 2020 Census block inside the township boundaries, at its USGS 3DEP height, weighted by the people who live there. Half of residents live higher, half lower.
- Lowest, highest, average: USGS 3DEP bare-earth heights on a 1 arc-second (≈100 ft, 30 m) grid, land only, inside the Census township boundaries (TIGER, Jan 1 2026).
- Nearby Places: nearby towns and rankings use each town's typical elevation, so every town is compared like for like. Rankings count every city, town, township and census-designated place, including places inside a town. Peaks and hills: the nearest summits with at least 980 ft (300 m) of prominence within 62 mi (100 km), then federal (GNIS) summits within 16 mi (25 km) when there are fewer than 5; each is the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a usable survey mark sits within 160 ft (50 m) of it (shown as published).
- Rounding: computed heights are rounded to 10 ft (5 m), or to 1 ft (1 m) under 100 ft; 3DEP is good to about a meter, not a foot. Published figures (FAA airport elevation, NGS survey heights) are shown as their publisher gives them.
- Datum: North American Vertical Datum of 1988 (NAVD 88). NGS plans to replace NAVD 88 with a new datum (NAPGD2022); heights will then shift slightly.
- Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (boundaries, 2020 blocks, 2024 population estimates, Gazetteer areas); FAA airport data; BTS time zones; NOAA NGS survey heights. All public domain.