Seneca Township, IL Elevation & Topographic Map

Topographic elevation map of Seneca Township, Illinois, shaded from 800 ft on the southwest side to 1,050 ft on the west side
Elevation
1,050 ft 320 m990 ft 300 m960 ft 290 m890 ft 270 m830 ft 255 m800 ft 245 m
Contours every 200 ft, bold every 1,000 ft
USGS 3DEP · U.S. Census Bureau
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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

Seneca Township 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: 830–940 ft
Lowest
800 ft 245 m
on the southwest side
Highest
1,050 ft 320 m
on the west side
Average
860 ft 260 m
all land inside township boundaries

Seneca Township spans about 250 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.

FigureElevation
Typical
Where people live: half of residents higher, half lower
870 ft265 m
Highest point
Inside township boundaries, on the west side
1,050 ft320 m
Lowest point
Inside township boundaries, on the southwest side
800 ft245 m
Average of all land860 ft260 m

Elevation profile, west to east

6.0 mi west to east through the middle of Seneca Township.

Topographic Map

Topographic elevation map of Seneca Township, Illinois, shaded from 800 ft on the southwest side to 1,050 ft on the west side
Township boundaries (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
Township in McHenry County, Illinois, United States
Population
2,882 2024 est.
Land area
35.9 sq mi
Density
80 per sq mi
Coordinates
42.2914° N, 88.5057° W
Time zone
Central UTC−6 / −5
Landform region
Central Lowland
Drains to
Kishwaukee River → Rock River → Mississippi River → Gulf of America
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WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.

Sources: U.S. Census Bureau, USGS

Nearby Places

Nearby towns by typical elevation

  1. Hartland Township940 ft
  2. Dorr Township940 ft
  3. Hartland920 ft
  4. Woodstock920 ft
  5. Coral920 ft
  6. Coral Township890 ft
  7. Seneca Township870 ft
  8. Franklinville830 ft
  9. Union830 ft
  10. Marengo830 ft
  11. Marengo Township830 ft

Rankings by typical elevation

Peaks and hills nearest, by height

  • Hill Fifteen910 ft
  • Camelback Kame870 ft
  • Bald Knob, McHenry County790 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); BTS time zones. All public domain.