Alexander County, IL Elevation & Topographic Map

Elevation

840 ft 255 m700 ft 215 m630 ft 195 m500 ft 150 m360 ft 110 m290 ft 90 m

Contours every 500 ft, bold every 2,500 ft

USGS 3DEP · U.S. Census Bureau

⤓ Download this map

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

Alexander County averages about 390 ft (120 m) above sea level across all its land. Its ground runs from 290 ft on the southeast side to 840 ft on Italian Hill.

Average elevation

390 ft 120 m

all land inside the county

Highest

840 ft 255 m

on Italian Hill

Lowest

290 ft 90 m

on the southeast side

Alexander County spans about 550 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	390 ft120 m
Highest point Inside the county, on Italian Hill	840 ft255 m
Lowest point Inside the county, on the southeast side	290 ft90 m

Elevation profile, west to east

7.7 mi west to east through Cairo.

Topographic Map

Location: County in Illinois, United States
Population: 4,594 2024 est.
Land area: 235.4 sq mi + 17.2 sq mi water
Density: 20 per sq mi
Time zone: Central UTC−6 / −5
Landform regions: Coastal Plain 53%, Ozark Plateaus 45%
Drains to: Gulf of America

⤓ Download this map

WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.

Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

Rankings by average elevation

Counties in Illinois99th highest of 102
Counties in the United States2,486th highest of 3,151

Peaks and hills highest inside

Italian Hill840 ft
Vick Hill820 ft
Burner Hill630 ft
Rattlesnake Hill470 ft
Dogtooth Bend Mounds330 ft

All 7 towns in Alexander County by typical elevation

Thebes430 ft
Olive Branch370 ft
East Cape Girardeau340 ft
McClure340 ft
Tamms330 ft
Unity330 ft
Cairo310 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.
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.