Adams County, IL Elevation & Topographic Map

Topographic elevation map of Adams County, Illinois, shaded from 450 ft on the southwest side to 860 ft on the southeast side
Elevation
860 ft 260 m760 ft 230 m710 ft 215 m600 ft 185 m500 ft 155 m450 ft 140 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

Adams County averages about 660 ft (200 m) above sea level across all its land. Its ground runs from 450 ft on the southwest side to 860 ft on the southeast side.

Average elevation
660 ft 200 m
all land inside the county
Highest
860 ft 260 m
on the southeast side
Lowest
450 ft 140 m
on the southwest side

Adams County spans about 410 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 land660 ft200 m
Highest point
Inside the county, on the southeast side
860 ft260 m
Lowest point
Inside the county, on the southwest side
450 ft140 m

Elevation profile, west to east

27 mi west to east through Quincy.

Topographic Map

Topographic elevation map of Adams County, Illinois, shaded from 450 ft on the southwest side to 860 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
64,109 2024 est.
Land area
855.1 sq mi + 16.1 sq mi water
Density
75 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. Adams County660 ft
  2. Hancock County640 ft
  3. Lewis County, MO630 ft
  4. Brown County630 ft
  5. Marion County, MO620 ft
  6. Pike County600 ft
  7. Schuyler County590 ft

Rankings by average elevation

Peaks and hills highest inside

  • The Mound, Adams County850 ft
All 47 towns in Adams County by typical elevation
  1. Kingston, Adams County800 ft
  2. Beverly790 ft
  3. Beverly Township760 ft
  4. Coatsburg760 ft
  5. Liberty750 ft
  6. Mendon750 ft
  7. Mendon Township740 ft
  8. Liberty Township740 ft
  9. Paloma730 ft
  10. Camp Point730 ft
  11. Payson730 ft
  12. Camp Point Township730 ft
  13. Fowler730 ft
  14. Clayton730 ft
  15. Clayton Township730 ft
  16. Honey Creek Township, Adams County730 ft
  17. Payson Township720 ft
  18. Adams720 ft
  19. Concord Township, Adams County720 ft
  20. Golden720 ft
  21. Northeast Township720 ft
  22. Gilmer Township720 ft
  23. Richfield Township710 ft
  24. Columbus710 ft
  25. Bloomfield710 ft
  26. La Prairie710 ft
  27. Columbus Township700 ft
  28. Burton Township, Adams County700 ft
  29. Richfield690 ft
  30. Houston Township690 ft
  31. Plainville690 ft
  32. Ellington Township690 ft
  33. McKee Township660 ft
  34. Lima660 ft
  35. Burton650 ft
  36. Lima Township630 ft
  37. Fall Creek Township630 ft
  38. Loraine630 ft
  39. Keene Township630 ft
  40. Melrose Township630 ft
  41. Quincy620 ft
  42. Marcelline610 ft
  43. Ursa610 ft
  44. Ursa Township600 ft
  45. Riverside Township, Adams County590 ft
  46. Meyer480 ft
  47. Fall Creek480 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, 430 ft at 39.9215° N, 91.2824° 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.