O'Fallon Township, IL Elevation & Topographic Map
Elevation
620 ft 190 m570 ft 175 m550 ft 165 m500 ft 150 m450 ft 135 m420 ft 130 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
O'Fallon Township sits at about 540 ft (165 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
540 ft 165 m
most residents: 500–560 ft
Lowest
420 ft 130 m
on the east side
Highest
620 ft 190 m
on the south side
Average
500 ft 150 m
all land inside township boundaries
O'Fallon Township spans about 200 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 | 540 ft165 m |
| Highest point Inside township boundaries, on the south side | 620 ft190 m |
| Lowest point Inside township boundaries, on the east side | 420 ft130 m |
| Town center USGS map point for O'Fallon Township | 550 ft170 m |
| Airport (BLV) FAA airport elevation, the highest point of its runways, 1.6 mi southeast of the township boundaries | 459 ft140 m |
| Average of all land | 500 ft150 m |
Elevation profile, west to east
5.9 mi west to east through the town center.
Topographic Map
- Location
- Township in St. Clair County, Illinois, United States
- Population
- 26,666 2024 est.
- Land area
- 35.1 sq mi + 0.7 sq mi water
- Density
- 759 per sq mi
- Coordinates
- 38.5923° N, 89.9112° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Central Lowland
- Drains to
- Silver Creek → Kaskaskia River → 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
- O'Fallon550 ft
- O'Fallon Township540 ft
- Belleville530 ft
- Lebanon480 ft
- Lebanon Township480 ft
- Shiloh Valley Township470 ft
- Scott AFB440 ft
Rankings by typical elevation
- Towns in Illinois2,262nd highest of 2,872
- Towns in St. Clair County10th highest of 50
Peaks and hills nearest, by height
- Fox Hill600 ft
- Browns Mound, Madison County590 ft
- Winstanley Hill580 ft
- Berger Hill560 ft
- Emerald Mound540 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).
- Pits: the lowest point is the lowest ground outside closed hollows (quarry floors, mine pits, terrain-model artifacts): any hollow under 0.4 sq mi (1 km²), and any hollow under 2 sq mi (5 km²) whose floor is more than 100 ft (30 m) below its rim; and outside patches below sea level of under 0.4 sq mi (1 km²). The single lowest 3DEP cell, 420 ft at 38.5743° N, 89.8321° W, is in such a hollow or patch and is not counted.
- 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. All public domain.