Madison County, IL Elevation & Topographic Map
Elevation
690 ft 210 m610 ft 185 m560 ft 170 m480 ft 145 m400 ft 120 m350 ft 110 m
Contours every 500 ft, bold every 2,500 ft
USGS 3DEP · U.S. Census Bureau
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
Madison County averages about 520 ft (160 m) above sea level across all its land. Its ground runs from 360 ft on the northwest side to 690 ft near the middle.
Average elevation
520 ft 160 m
all land inside the county
Highest
690 ft 210 m
near the middle
Lowest
360 ft 110 m
on the northwest side
Madison County spans about 330 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.
| Figure | Elevation |
|---|---|
| Average of all land | 520 ft160 m |
| Highest point Inside the county, near the middle | 690 ft210 m |
| Lowest point Inside the county, on the northwest side | 360 ft110 m |
Elevation profile, west to east
28 mi west to east through Edwardsville Township.
Topographic Map
- Location
- County in Illinois, United States
- Population
- 263,017 2024 est.
- Land area
- 715.5 sq mi + 24.4 sq mi water
- Density
- 368 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
- Montgomery County640 ft
- Macoupin County630 ft
- Jersey County580 ft
- St. Louis County, MO550 ft
- St. Charles County, MO540 ft
- Bond County540 ft
- Madison County520 ft
- St. Louis city, MO490 ft
- St. Clair County470 ft
- Clinton County450 ft
Rankings by average elevation
- Counties in Illinois74th highest of 102
- Counties in the United States2,303rd highest of 3,151
Peaks and hills highest inside
- Fox Hill600 ft
- Browns Mound, Madison County590 ft
- Neudeckers Mountain560 ft
- Monks Mound520 ft
All 56 towns in Madison County by typical elevation
- New Douglas620 ft
- New Douglas Township620 ft
- Williamson600 ft
- Godfrey590 ft
- Olive Township590 ft
- Livingston590 ft
- Prairietown580 ft
- Worden570 ft
- Maryville570 ft
- Omphghent Township570 ft
- Alhambra570 ft
- Troy560 ft
- Jarvis Township560 ft
- Alhambra Township550 ft
- Glen Carbon550 ft
- Leef Township550 ft
- Edwardsville Township550 ft
- Hamel550 ft
- Edwardsville540 ft
- Collinsville Township540 ft
- Pin Oak Township540 ft
- Collinsville540 ft
- Hamel Township530 ft
- Saline Township530 ft
- Grantfork530 ft
- Foster Township530 ft
- Moro Township530 ft
- Moro530 ft
- Highland530 ft
- Rosewood Heights530 ft
- Alton530 ft
- Helvetia Township520 ft
- Pierron partly520 ft
- Holiday Shores520 ft
- Bethalto520 ft
- Marine520 ft
- Marine Township520 ft
- Fort Russell Township520 ft
- St. Jacob510 ft
- St. Jacob Township510 ft
- Wood River Township450 ft
- Roxana440 ft
- Wood River440 ft
- South Roxana440 ft
- East Alton440 ft
- Hartford430 ft
- Mitchell430 ft
- Chouteau Township430 ft
- Granite City420 ft
- Granite City Township420 ft
- Fairmont City partly420 ft
- Nameoki Township420 ft
- Pontoon Beach420 ft
- Madison410 ft
- Venice Township410 ft
- Venice410 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, 300 ft at 38.9043° N, 90.1790° 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.