Montgomery County, IL Elevation & Topographic Map

Topographic elevation map of Montgomery County, Illinois, shaded from 510 ft on the south side to 780 ft on the east side
Elevation
780 ft 240 m710 ft 215 m680 ft 205 m610 ft 185 m540 ft 165 m510 ft 155 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

Montgomery County averages about 640 ft (195 m) above sea level across all its land. Its ground runs from 510 ft on the south side to 780 ft on the east side.

Average elevation
640 ft 195 m
all land inside the county
Highest
780 ft 240 m
on the east side
Lowest
510 ft 155 m
on the south side

Montgomery County spans about 270 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 land640 ft195 m
Highest point
Inside the county, on the east side
780 ft240 m
Lowest point
Inside the county, on the south side
510 ft155 m

Elevation profile, south to north

22 mi south to north through Hillsboro Township.

Topographic Map

Topographic elevation map of Montgomery County, Illinois, shaded from 510 ft on the south side to 780 ft on the east side
County boundary (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
County in Illinois, United States
Population
27,615 2024 est.
Land area
703.8 sq mi + 6.0 sq mi water
Density
39 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. Shelby County640 ft
  2. Montgomery County640 ft
  3. Macoupin County630 ft
  4. Christian County620 ft
  5. Sangamon County600 ft
  6. Fayette County550 ft
  7. Bond County540 ft
  8. Madison County520 ft

Rankings by average elevation

Peaks and hills highest inside

  • Bald Knob, Montgomery County770 ft
  • Cress Hill710 ft
  • Huber Hill690 ft
  • Robbs Mound670 ft
All 38 towns in Montgomery County by typical elevation
  1. Ohlman690 ft
  2. North Litchfield Township690 ft
  3. Litchfield680 ft
  4. South Litchfield Township680 ft
  5. Nokomis680 ft
  6. Nokomis Township680 ft
  7. Coalton680 ft
  8. Wenonah670 ft
  9. Audubon Township670 ft
  10. Witt670 ft
  11. Witt Township660 ft
  12. Irving650 ft
  13. Irving Township650 ft
  14. Waggoner640 ft
  15. Rountree Township640 ft
  16. Pitman Township640 ft
  17. Zanesville Township640 ft
  18. Raymond Township640 ft
  19. Raymond640 ft
  20. Bois D'Arc Township640 ft
  21. Farmersville640 ft
  22. Harvel640 ft
  23. Harvel Township640 ft
  24. Fillmore630 ft
  25. Schram City630 ft
  26. Butler630 ft
  27. Butler Grove Township630 ft
  28. Coffeen630 ft
  29. Hillsboro630 ft
  30. Hillsboro Township630 ft
  31. East Fork Township630 ft
  32. Taylor Springs630 ft
  33. Fillmore Consolidated Township620 ft
  34. Donnellson620 ft
  35. Walshville Township610 ft
  36. Walshville610 ft
  37. Grisham Township590 ft
  38. Panama580 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, 500 ft at 39.0290° N, 89.5385° 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.