Marion County, IL Elevation & Topographic Map

Topographic elevation map of Marion County, Illinois, shaded from 420 ft on the southeast side to 650 ft on the north side
Elevation
650 ft 200 m600 ft 180 m570 ft 175 m510 ft 155 m450 ft 135 m420 ft 130 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

Marion County averages about 530 ft (165 m) above sea level across all its land. Its ground runs from 420 ft on the southeast side to 650 ft on the north side.

Average elevation
530 ft 165 m
all land inside the county
Highest
650 ft 200 m
on the north side
Lowest
420 ft 130 m
on the southeast side

Marion County spans about 230 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 land530 ft165 m
Highest point
Inside the county, on the north side
650 ft200 m
Lowest point
Inside the county, on the southeast side
420 ft130 m

Elevation profile, west to east

24 mi west to east through Centralia Township.

Topographic Map

Topographic elevation map of Marion County, Illinois, shaded from 420 ft on the southeast side to 650 ft on the north side
County boundary (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
County in Illinois, United States
Population
36,437 2024 est.
Land area
572.5 sq mi + 3.6 sq mi water
Density
64 per sq mi
Time zone
Central UTC−6 / −5
Landform region
Central Lowland
Drains to
Gulf of America
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Fayette County550 ft
  2. Marion County530 ft
  3. Jefferson County490 ft
  4. Clay County490 ft
  5. Washington County480 ft
  6. Clinton County450 ft
  7. Wayne County440 ft

Rankings by average elevation

Peaks and hills highest inside

  • Creeds Hill610 ft
  • Lowe Mound590 ft
  • Fikes Hill580 ft
All 31 towns in Marion County by typical elevation
  1. Alma620 ft
  2. Kell620 ft
  3. Kinmundy610 ft
  4. Kinmundy Township600 ft
  5. Alma Township580 ft
  6. Meacham Township570 ft
  7. Tonti Township570 ft
  8. Walnut Hill560 ft
  9. Haines Township560 ft
  10. Foster Township, Marion County550 ft
  11. Raccoon Township540 ft
  12. Salem540 ft
  13. Salem Township540 ft
  14. Stevenson Township530 ft
  15. Odin530 ft
  16. Odin Township520 ft
  17. Vernon520 ft
  18. Carrigan Township520 ft
  19. Omega Township520 ft
  20. Iuka510 ft
  21. Iuka Township510 ft
  22. Sandoval510 ft
  23. Patoka Township500 ft
  24. Patoka500 ft
  25. Sandoval Township500 ft
  26. Centralia Township500 ft
  27. Romine Township500 ft
  28. Centralia500 ft
  29. Wamac partly500 ft
  30. Junction City490 ft
  31. Central City480 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.