Oneco Township, IL Elevation & Topographic Map

Topographic elevation map of Oneco Township, Illinois, shaded from 780 ft on the west side to 1,050 ft on the east side
Elevation
1,050 ft 320 m980 ft 300 m950 ft 290 m880 ft 270 m820 ft 250 m780 ft 240 m
Contours every 100 ft, bold every 500 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

Oneco Township sits at about 860 ft (265 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
860 ft 265 m
most residents: 810–940 ft
Lowest
780 ft 240 m
on the west side
Highest
1,050 ft 320 m
on the east side
Average
910 ft 275 m
all land inside township boundaries

Oneco Township spans about 270 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
860 ft265 m
Highest point
Inside township boundaries, on the east side
1,050 ft320 m
Lowest point
Inside township boundaries, on the west side
780 ft240 m
Town center
USGS map point for Oneco Township
840 ft255 m
Average of all land910 ft275 m

Elevation profile, west to east

9.0 mi west to east through the town center.

Topographic Map

Topographic elevation map of Oneco Township, Illinois, shaded from 780 ft on the west side to 1,050 ft on the east side
Township boundaries (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
Township in Stephenson County, Illinois, United States
Population
1,241 2024 est.
Land area
27.5 sq mi
Density
45 per sq mi
Coordinates
42.4875° N, 89.6643° W
Time zone
Central UTC−6 / −5
Landform region
Central Lowland
Drains to
Pecatonica River → Rock River → Mississippi River → Gulf of America
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Sources: U.S. Census Bureau, USGS

Nearby Places

Nearby towns by typical elevation

  1. Monroe, WI1,070 ft
  2. Clarno, WI970 ft
  3. Cadiz, WI880 ft
  4. Rock Grove Township880 ft
  5. Oneco Township860 ft
  6. Orangeville840 ft
  7. Buckeye Township840 ft
  8. Cedarville840 ft
  9. Waddams Township830 ft
  10. Winslow Township820 ft
  11. Winslow790 ft

Rankings by typical elevation

Peaks and hills nearest, by height

  • Benton Mound1,230 ft
  • Simmons Mound1,080 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.