Forreston Township, IL Elevation & Topographic Map
Elevation
1,010 ft 310 m960 ft 295 m940 ft 285 m890 ft 270 m840 ft 260 m820 ft 250 m
Contours every 200 ft, bold every 1,000 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
Forreston Township sits at about 940 ft (285 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
940 ft 285 m
most residents: 910–960 ft
Lowest
820 ft 250 m
on the southwest side
Highest
1,010 ft 310 m
on the west side
Average
930 ft 285 m
all land inside township boundaries
Forreston Township spans about 190 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 | 940 ft285 m |
| Highest point Inside township boundaries, on the west side | 1,010 ft310 m |
| Lowest point Inside township boundaries, on the southwest side | 820 ft250 m |
| Town center USGS map point for Forreston Township | 940 ft285 m |
| Airport (FEP) FAA airport elevation, the highest point of its runways, 3.1 mi north of the township boundaries | 859 ft262 m |
| Average of all land | 930 ft285 m |
Elevation profile, west to east
6.0 mi west to east through the town center.
Topographic Map
- Location
- Township in Ogle County, Illinois, United States
- Population
- 1,951 2024 est.
- Land area
- 36.3 sq mi
- Density
- 54 per sq mi
- Coordinates
- 42.1261° N, 89.5793° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Central Lowland
- Drains to
- Rock River → Mississippi River → Gulf of America
- Airport
- Albertus (FEP) 859 ft
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Sources: U.S. Census Bureau, USGS, FAA
Nearby Places
Nearby towns by typical elevation
- Forreston940 ft
- Forreston Township940 ft
- Baileyville940 ft
- Shannon930 ft
- Lincoln Township890 ft
- Silver Creek Township840 ft
- Florence Township840 ft
- German Valley830 ft
- Brookville Township820 ft
- Maryland Township820 ft
- Adeline800 ft
Rankings by typical elevation
- Towns in Illinois24th highest of 2,872
- Towns in Ogle County2nd highest of 42
Peaks and hills nearest, by height
- Bunker Hill, Stephenson County960 ft
- Coffman Bluff950 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. All public domain.