Richland County, IL Elevation & Topographic Map

Topographic elevation map of Richland County, Illinois, shaded from 390 ft on the south side to 600 ft on the northeast side
Elevation
600 ft 185 m550 ft 170 m530 ft 160 m470 ft 145 m420 ft 130 m390 ft 120 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

Richland County averages about 480 ft (145 m) above sea level across all its land. Its ground runs from 390 ft on the south side to 600 ft on the northeast side.

Average elevation
480 ft 145 m
all land inside the county
Highest
600 ft 185 m
on the northeast side
Lowest
390 ft 120 m
on the south side

Richland County spans about 210 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 land480 ft145 m
Highest point
Inside the county, on the northeast side
600 ft185 m
Lowest point
Inside the county, on the south side
390 ft120 m

Elevation profile, west to east

20 mi west to east through Olney Township.

Topographic Map

Topographic elevation map of Richland County, Illinois, shaded from 390 ft on the south side to 600 ft on the northeast side
County boundary (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
County in Illinois, United States
Population
15,362 2024 est.
Land area
360.0 sq mi + 1.9 sq mi water
Density
43 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. Jasper County530 ft
  2. Crawford County500 ft
  3. Clay County490 ft
  4. Richland County480 ft
  5. Lawrence County450 ft
  6. Edwards County440 ft
  7. Wayne County440 ft
  8. Wabash County430 ft

Rankings by average elevation

Peaks and hills highest inside

  • Onion Hill560 ft
All 15 towns in Richland County by typical elevation
  1. Calhoun530 ft
  2. Claremont Township510 ft
  3. Claremont510 ft
  4. Denver Township490 ft
  5. Olney480 ft
  6. German Township480 ft
  7. Olney Township480 ft
  8. Parkersburg480 ft
  9. Madison Township480 ft
  10. Dundas480 ft
  11. Preston Township480 ft
  12. Bonpas Township470 ft
  13. Noble470 ft
  14. Noble Township470 ft
  15. Decker Township440 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, 390 ft at 38.6021° N, 88.1529° 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.