Decatur Township, IL Elevation & Topographic Map
Elevation
720 ft 220 m680 ft 210 m670 ft 205 m630 ft 195 m600 ft 185 m580 ft 180 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
Decatur Township sits at about 670 ft (205 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
670 ft 205 m
most residents: 640–690 ft
Lowest
580 ft 180 m
on the west side
Highest
720 ft 220 m
near the middle
Average
660 ft 200 m
all land inside township boundaries
Decatur Township spans about 140 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 | 670 ft205 m |
| Highest point Inside township boundaries, near the middle | 720 ft220 m |
| Lowest point Inside township boundaries, on the west side | 580 ft180 m |
| Town center USGS map point for Decatur Township | 680 ft205 m |
| Airport (DEC) FAA airport elevation, the highest point of its runways, 1.2 mi east of the township boundaries | 682 ft208 m |
| Average of all land | 660 ft200 m |
Elevation profile, south to north
5.0 mi south to north through the town center.
Topographic Map
- Location
- Township in Macon County, Illinois, United States
- Population
- 45,999 2024 est.
- Land area
- 29.1 sq mi + 2.0 sq mi water
- Density
- 1,583 per sq mi
- Coordinates
- 39.8403° N, 88.9548° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Central Lowland
- Drains to
- Sangamon River → Illinois River → Mississippi River → Gulf of America
- Airport
- Decatur (DEC) 682 ft
⤓ Download this map
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Sources: U.S. Census Bureau, USGS, FAA
Nearby Places
Nearby towns by typical elevation
- Elwin710 ft
- Mount Zion Township680 ft
- South Wheatland Township670 ft
- Mount Zion670 ft
- Whitmore Township670 ft
- Decatur Township670 ft
- Decatur670 ft
- Forsyth670 ft
- Hickory Point Township670 ft
- Long Creek660 ft
- Long Creek Township660 ft
Rankings by typical elevation
- Towns in Illinois1,158th highest of 2,872
- Towns in Macon County18th highest of 30
Peaks and hills nearest, by height
- Long Mound680 ft
- Blue Mound, Macon County670 ft
- Yellow Hammer Knob610 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, 580 ft at 39.8287° N, 88.9715° 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.