Alger County, MI Elevation & Topographic Map

Topographic elevation map of Alger County, Michigan, shaded from 600 ft on the southwest side to 1,160 ft on the southeast side
Elevation
1,160 ft 355 m1,020 ft 310 m950 ft 290 m810 ft 245 m670 ft 205 m600 ft 185 m
Zoom in for contour lines
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

Alger County averages about 860 ft (265 m) above sea level across all its land. Its ground runs from 600 ft on the southwest side to 1,160 ft on the southeast side.

Average elevation
860 ft 265 m
all land inside the county
Highest
1,160 ft 355 m
on the southeast side
Lowest
600 ft 185 m
on the southwest side

Alger County spans about 560 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 land860 ft265 m
Highest point
Inside the county, on the southeast side
1,160 ft355 m
Lowest point
Inside the county, on the southwest side
600 ft185 m

Elevation profile, west to east

36 mi west to east through Munising Township.

Topographic Map

Topographic elevation map of Alger County, Michigan, shaded from 600 ft on the southwest side to 1,160 ft on the southeast side
County boundary (dashed) over shaded terrain, with contours every 100 ft (30 m).
Location
County in Michigan, United States
Population
8,695 2024 est.
Land area
915.0 sq mi + 4,132.6 sq mi water
Density
9.5 per sq mi
Time zone
Eastern UTC−5 / −4
Landform region
Central Lowland 99%
Drains to
Great Lakes
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Marquette County1,240 ft
  2. Alger County860 ft
  3. Keweenaw County850 ft
  4. Luce County770 ft
  5. Schoolcraft County730 ft
  6. Delta County730 ft

Rankings by average elevation

Peaks and hills highest inside

  • Grand Sable Dunes1,010 ft
All 11 towns in Alger County by typical elevation
  1. Rock River Township940 ft
  2. Limestone Township930 ft
  3. Chatham880 ft
  4. Munising Township870 ft
  5. Mathias Township870 ft
  6. Grand Island Township750 ft
  7. Burt Township, Alger County740 ft
  8. Grand Marais710 ft
  9. Onota Township680 ft
  10. Au Train Township680 ft
  11. Munising640 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 2 arc-second (≈200 ft, 62 m) grid, coarsened from 1 arc-second so the whole area fits one run. Land means the boundary minus Census area water (on this grid, water areas of at least half a cell).
  • Highest and lowest: the highest land cell, re-read at 1 arc-second around the 25 highest grid cells. Lowest: the lowest land cell, re-read at 1 arc-second around the 25 lowest grid cells; 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.