Brown County, IL Elevation & Topographic Map

Topographic elevation map of Brown County, Illinois, shaded from 420 ft on the southeast side to 810 ft on the west side
Elevation
810 ft 245 m710 ft 215 m660 ft 200 m570 ft 175 m470 ft 145 m420 ft 130 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

Brown County averages about 630 ft (190 m) above sea level across all its land. Its ground runs from 420 ft on the southeast side to 810 ft on the west side.

Average elevation
630 ft 190 m
all land inside the county
Highest
810 ft 245 m
on the west side
Lowest
420 ft 130 m
on the southeast side

Brown County spans about 390 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 land630 ft190 m
Highest point
Inside the county, on the west side
810 ft245 m
Lowest point
Inside the county, on the southeast side
420 ft130 m

Elevation profile, west to east

21 mi west to east through Mount Sterling Township.

Topographic Map

Topographic elevation map of Brown County, Illinois, shaded from 420 ft on the southeast side to 810 ft on the west side
County boundary (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
County in Illinois, United States
Population
6,307 2024 est.
Land area
305.7 sq mi + 1.6 sq mi water
Density
21 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. Brown County630 ft
  3. Morgan County620 ft
  4. Pike County600 ft
  5. Schuyler County590 ft
  6. Cass County540 ft

Rankings by average elevation

All 13 towns in Brown County by typical elevation
  1. Mound Station750 ft
  2. Lee Township750 ft
  3. Mount Sterling720 ft
  4. Mount Sterling Township710 ft
  5. Pea Ridge Township700 ft
  6. Buckhorn Township670 ft
  7. Missouri Township640 ft
  8. Elkhorn Township630 ft
  9. Versailles620 ft
  10. Cooperstown Township610 ft
  11. Versailles Township610 ft
  12. Ripley Township550 ft
  13. Ripley550 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, 420 ft at 39.8787° N, 90.5874° 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.