Warren County, IL Elevation & Topographic Map

Topographic elevation map of Warren County, Illinois, shaded from 570 ft on the southeast side to 810 ft on the south side
Elevation
810 ft 245 m750 ft 230 m720 ft 220 m660 ft 200 m600 ft 185 m570 ft 175 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

Warren County averages about 720 ft (220 m) above sea level across all its land. Its ground runs from 570 ft on the southeast side to 810 ft on the south side.

Average elevation
720 ft 220 m
all land inside the county
Highest
810 ft 245 m
on the south side
Lowest
570 ft 175 m
on the southeast side

Warren County spans about 240 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 land720 ft220 m
Highest point
Inside the county, on the south side
810 ft245 m
Lowest point
Inside the county, on the southeast side
570 ft175 m

Elevation profile, south to north

30 mi south to north through Monmouth Township.

Topographic Map

Topographic elevation map of Warren County, Illinois, shaded from 570 ft on the southeast side to 810 ft on the south side
County boundary (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
County in Illinois, United States
Population
16,217 2024 est.
Land area
542.4 sq mi + 0.7 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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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Knox County720 ft
  2. Warren County720 ft
  3. Mercer County680 ft
  4. McDonough County670 ft
  5. Henderson County650 ft
  6. Fulton County600 ft

Rankings by average elevation

All 22 towns in Warren County by typical elevation
  1. Point Pleasant Township780 ft
  2. Cameron770 ft
  3. Lenox Township760 ft
  4. Coldbrook Township760 ft
  5. Monmouth760 ft
  6. Swan Township760 ft
  7. Monmouth Township760 ft
  8. Kirkwood750 ft
  9. Tompkins Township750 ft
  10. Floyd Township750 ft
  11. Roseville740 ft
  12. Roseville Township740 ft
  13. Hale Township740 ft
  14. Ellison Township730 ft
  15. Kelly Township730 ft
  16. Alexis700 ft
  17. Berwick Township690 ft
  18. Spring Grove Township690 ft
  19. Greenbush Township670 ft
  20. Avon partly640 ft
  21. Sumner Township, Warren County620 ft
  22. Little York620 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, 510 ft at 40.7374° N, 90.4668° 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.