Marshall County, IL Elevation & Topographic Map

Topographic elevation map of Marshall County, Illinois, shaded from 440 ft on the southwest side to 900 ft on the west side
Elevation
900 ft 275 m790 ft 240 m730 ft 225 m620 ft 190 m500 ft 155 m440 ft 135 m
Contours every 500 ft, bold every 2,500 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.
County area
Fades everything outside the official county boundary (US Census).

Elevation Data

Marshall County averages about 670 ft (205 m) above sea level across all its land. Its ground runs from 440 ft on the southwest side to 900 ft on the west side.

Average elevation
670 ft 205 m
all land inside the county
Highest
900 ft 275 m
on the west side
Lowest
440 ft 135 m
on the southwest side

Marshall County spans about 460 ft of height, so no single spot tells the whole story. The ruler shows where most of its land lies, and where the other numbers you'll see come from.

FigureElevation
Average of all land670 ft205 m
Highest point
Inside the county, on the west side
900 ft275 m
Lowest point
Inside the county, on the southwest side
440 ft135 m

Elevation profile, west to east

15 mi west to east through Henry Township.

Topographic Map

Topographic elevation map of Marshall County, Illinois, shaded from 440 ft on the southwest side to 900 ft on the west side
County boundary (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
County in Illinois, United States
Population
11,552 2024 est.
Land area
386.8 sq mi + 11.7 sq mi water
Density
30 per sq mi
Time zone
Central UTC−6 / −5
Landform region
Central Lowland
Drains to
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

Neighboring counties sharing a border, by average

  1. Stark County720 ft
  2. Woodford County720 ft
  3. Bureau County700 ft
  4. Marshall County670 ft
  5. LaSalle County660 ft
  6. Peoria County650 ft
  7. Putnam County610 ft

Rankings by average elevation

All 21 towns in Marshall County by typical elevation
  1. Saratoga Township, Marshall County780 ft
  2. La Prairie Township770 ft
  3. Varna730 ft
  4. Roberts Township700 ft
  5. Bennington Township690 ft
  6. Toluca690 ft
  7. Washburn partly690 ft
  8. Wenona690 ft
  9. Evans Township690 ft
  10. Bell Plain Township690 ft
  11. La Rose680 ft
  12. Richland Township, Marshall County650 ft
  13. Whitefield Township640 ft
  14. Hopewell Township640 ft
  15. Hopewell610 ft
  16. Steuben Township560 ft
  17. Sparland550 ft
  18. Lacon Township500 ft
  19. Lacon500 ft
  20. Henry Township490 ft
  21. Henry490 ft
How we measure
  • Average: every USGS 3DEP bare-earth cell of land inside the Census county boundary (TIGER/Line, Jan 1 2026), weighted equally, on a 1 arc-second (≈100 ft, 30 m) grid. Land means the boundary minus Census area water.
  • Highest and lowest: the highest land cell. Lowest: the lowest land cell; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
  • Nearby Places: neighboring counties and rankings use each one's average elevation, on its own grid, the same figure its page shows. Peaks and hills: the highest summits inside the county with at least 980 ft (300 m) of prominence, then the highest federal (GNIS) summits inside it 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).
  • Towns: each town's typical elevation (population-weighted median of its own 2020 blocks at 1 arc-second); a town is listed when any of its 2020 residents live in the county.
  • 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 (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 (TIGER boundaries and water, 2020 blocks, 2024 population estimates, county adjacency); NOAA NGS survey heights; BTS time zones. All public domain.