Grant County, SD Elevation & Topographic Map

Topographic elevation map of Grant County, South Dakota, shaded from 970 ft on the northeast side to 2,060 ft on the west side
Elevation
2,060 ft 630 m1,790 ft 545 m1,650 ft 505 m1,380 ft 420 m1,100 ft 335 m970 ft 295 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

Grant County averages about 1,450 ft (440 m) above sea level across all its land. Its ground runs from 970 ft on the northeast side to 2,060 ft on the west side.

Average elevation
1,450 ft 440 m
all land inside the county
Highest
2,060 ft 630 m
on the west side
Lowest
970 ft 295 m
on the northeast side

Grant County spans about 1,090 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 land1,450 ft440 m
Highest point
Inside the county, on the west side
2,060 ft630 m
Lowest point
Inside the county, on the northeast side
970 ft295 m

Elevation profile, west to east

38 mi west to east through Milbank.

Topographic Map

Topographic elevation map of Grant County, South Dakota, shaded from 970 ft on the northeast side to 2,060 ft on the west side
County boundary (dashed) over shaded terrain, with contours every 100 ft (30 m).
Location
County in South Dakota, United States
Population
7,618 2024 est.
Land area
681.4 sq mi + 6.1 sq mi water
Density
11 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. Codington County1,820 ft
  2. Deuel County1,770 ft
  3. Day County1,740 ft
  4. Grant County1,450 ft
  5. Roberts County1,330 ft
  6. Big Stone County, MN1,100 ft
  7. Lac qui Parle County, MN1,070 ft

Rankings by average elevation

Peaks and hills highest inside

  • Big Tom Hill1,170 ft
All 26 towns in Grant County by typical elevation
  1. Farmington Township, Grant County1,950 ft
  2. Mazeppa Township1,930 ft
  3. Troy Township1,870 ft
  4. Blooming Valley Township1,870 ft
  5. Lura Township1,850 ft
  6. Stockholm Township1,700 ft
  7. Strandburg1,680 ft
  8. Marvin1,660 ft
  9. Stockholm1,660 ft
  10. Georgia Township1,600 ft
  11. Osceola Township1,500 ft
  12. La Bolt1,370 ft
  13. Twin Brooks Township1,320 ft
  14. Twin Brooks1,260 ft
  15. Madison Township1,260 ft
  16. Kilborn Township1,230 ft
  17. Adams Township1,210 ft
  18. Revillo1,200 ft
  19. Albee1,180 ft
  20. Grant Center Township1,160 ft
  21. Milbank1,150 ft
  22. Vernon Township1,130 ft
  23. Alban Township1,130 ft
  24. Melrose Township1,130 ft
  25. Big Stone Township1,080 ft
  26. Big Stone City1,040 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, 900 ft at 45.2101° N, 96.5074° 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.