Seward Township, Winnebago County, IL Elevation & Topographic Map
Elevation
940 ft 285 m890 ft 270 m870 ft 265 m820 ft 250 m770 ft 235 m750 ft 230 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
Seward Township, Winnebago County sits at about 870 ft (265 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
870 ft 265 m
most residents: 820–890 ft
Lowest
750 ft 230 m
on the southeast side
Highest
940 ft 285 m
on the east side
Average
850 ft 260 m
all land inside township boundaries
Seward Township, Winnebago County 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 | 870 ft265 m |
| Highest point Inside township boundaries, on the east side | 940 ft285 m |
| Lowest point Inside township boundaries, on the southeast side | 750 ft230 m |
| Town center USGS map point for Seward Township, Winnebago County | 890 ft270 m |
| Airport (RFD) FAA airport elevation, the highest point of its runways, 9.4 mi east of the township boundaries | 742 ft226 m |
| Average of all land | 850 ft260 m |
Elevation profile, south to north
6.0 mi south to north through the town center.
Topographic Map
- Location
- Township in Winnebago County, Illinois, United States
- Population
- 840 2024 est.
- Land area
- 35.8 sq mi
- Density
- 23 per sq mi
- Coordinates
- 42.2389° N, 89.3579° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Central Lowland
- Drains to
- Rock River → Mississippi River → Gulf of America
- Airport
- Chicago/Rockford International (RFD) 742 ft
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Sources: U.S. Census Bureau, USGS, FAA
Nearby Places
Nearby towns by typical elevation
- Winnebago880 ft
- Winnebago Township870 ft
- Seward Township, Winnebago County870 ft
- German Valley830 ft
- Ridott Township830 ft
- Westlake Village800 ft
- Pecatonica Township790 ft
- Pecatonica780 ft
- Ridott760 ft
- Leaf River Township760 ft
- Leaf River720 ft
Rankings by typical elevation
- Towns in Illinois116th highest of 2,872
- Towns in Winnebago County5th highest of 27
Peaks and hills nearest, by height
- Bunker Hill, Stephenson County960 ft
- Coffman Bluff950 ft
- Lookout Point830 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.