Henderson County, IL Elevation & Topographic Map

Topographic elevation map of Henderson County, Illinois, shaded from 490 ft on the southwest side to 800 ft on the southeast side
Elevation
800 ft 245 m720 ft 220 m680 ft 210 m600 ft 185 m520 ft 160 m490 ft 150 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

Henderson County averages about 650 ft (195 m) above sea level across all its land. Its ground runs from 490 ft on the southwest side to 800 ft on the southeast side.

Average elevation
650 ft 195 m
all land inside the county
Highest
800 ft 245 m
on the southeast side
Lowest
490 ft 150 m
on the southwest side

Henderson County spans about 310 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 land650 ft195 m
Highest point
Inside the county, on the southeast side
800 ft245 m
Lowest point
Inside the county, on the southwest side
490 ft150 m

Elevation profile, south to north

30 mi south to north through Oquawka Township.

Topographic Map

Topographic elevation map of Henderson County, Illinois, shaded from 490 ft on the southwest side to 800 ft on the southeast side
County boundary (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
County in Illinois, United States
Population
6,048 2024 est.
Land area
378.8 sq mi + 16.4 sq mi water
Density
16 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. Warren County720 ft
  2. Mercer County680 ft
  3. Des Moines County, IA680 ft
  4. McDonough County670 ft
  5. Lee County, IA650 ft
  6. Henderson County650 ft
  7. Hancock County640 ft

Rankings by average elevation

Peaks and hills highest inside

  • Gittings Mound760 ft
All 21 towns in Henderson County by typical elevation
  1. Raritan Township760 ft
  2. Raritan760 ft
  3. Terre Haute Township710 ft
  4. Rozetta Township710 ft
  5. Media700 ft
  6. Media Township690 ft
  7. Biggsville Township680 ft
  8. Stronghurst680 ft
  9. Biggsville670 ft
  10. Stronghurst Township670 ft
  11. Bald Bluff Township580 ft
  12. Oquawka Township560 ft
  13. Gladstone Township560 ft
  14. Oquawka560 ft
  15. Dallas City partly550 ft
  16. Gladstone550 ft
  17. Lomax Township550 ft
  18. Lomax550 ft
  19. Carman540 ft
  20. Carman Township540 ft
  21. Gulfport520 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.