Henry County, IL Elevation & Topographic Map

Topographic elevation map of Henry County, Illinois, shaded from 560 ft on the northwest side to 880 ft on the southeast side
Elevation
880 ft 270 m800 ft 245 m760 ft 235 m680 ft 210 m600 ft 185 m560 ft 170 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

Henry County averages about 710 ft (215 m) above sea level across all its land. Its ground runs from 560 ft on the northwest side to 880 ft on the southeast side.

Average elevation
710 ft 215 m
all land inside the county
Highest
880 ft 270 m
on the southeast side
Lowest
560 ft 170 m
on the northwest side

Henry County spans about 320 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 land710 ft215 m
Highest point
Inside the county, on the southeast side
880 ft270 m
Lowest point
Inside the county, on the northwest side
560 ft170 m

Elevation profile, south to north

30 mi south to north through Kewanee.

Topographic Map

Topographic elevation map of Henry County, Illinois, shaded from 560 ft on the northwest side to 880 ft on the southeast side
County boundary (dashed) over shaded terrain, with contours every 40 ft (12 m).
Location
County in Illinois, United States
Population
48,177 2024 est.
Land area
823.2 sq mi + 2.5 sq mi water
Density
59 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. Stark County720 ft
  2. Knox County720 ft
  3. Henry County710 ft
  4. Bureau County700 ft
  5. Mercer County680 ft
  6. Rock Island County670 ft
  7. Whiteside County660 ft

Rankings by average elevation

Peaks and hills highest inside

  • Hickory Point720 ft
  • Indian Hill, Henry County670 ft
All 43 towns in Henry County by typical elevation
  1. Galva840 ft
  2. Galva Township840 ft
  3. Kewanee830 ft
  4. Wethersfield Township830 ft
  5. Kewanee Township830 ft
  6. Woodhull820 ft
  7. Clover Township820 ft
  8. Nekoma810 ft
  9. Alpha800 ft
  10. Cambridge800 ft
  11. Oxford Township800 ft
  12. Cambridge Township800 ft
  13. Weller Township790 ft
  14. Bishop Hill790 ft
  15. Andover780 ft
  16. Andover Township780 ft
  17. Orion780 ft
  18. Western Township780 ft
  19. Osco770 ft
  20. Burns Township770 ft
  21. Osco Township760 ft
  22. Lynn Center750 ft
  23. Lynn Township740 ft
  24. Munson Township740 ft
  25. Ophiem700 ft
  26. Cornwall Township700 ft
  27. Coal Valley partly690 ft
  28. Hanna Township670 ft
  29. Phenix Township660 ft
  30. Atkinson650 ft
  31. Atkinson Township650 ft
  32. Geneseo650 ft
  33. Geneseo Township640 ft
  34. Edford Township640 ft
  35. Annawan Township630 ft
  36. Annawan630 ft
  37. Hooppole620 ft
  38. Yorktown Township620 ft
  39. Alba Township620 ft
  40. Loraine Township610 ft
  41. Colona Township600 ft
  42. Colona590 ft
  43. Cleveland570 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.
  • Pits: the lowest point is the lowest ground outside closed hollows (quarry floors, mine pits, terrain-model artifacts): any hollow under 0.4 sq mi (1 km²), and any hollow under 2 sq mi (5 km²) whose floor is more than 100 ft (30 m) below its rim; and outside patches below sea level of under 0.4 sq mi (1 km²). The single lowest 3DEP cell, 230 ft at 41.5035° N, 90.3071° W, is in such a hollow or patch and is not counted.
  • 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.