Iona Township, SD Elevation & Topographic Map

Topographic elevation map of Iona Township, South Dakota, shaded from 1,350 ft on the north side to 2,230 ft on the southwest side
Elevation
2,230 ft 680 m2,010 ft 615 m1,900 ft 580 m1,680 ft 515 m1,460 ft 445 m1,350 ft 415 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.
Township area
Fades everything outside the official township boundaries (US Census).

Elevation Data

Iona Township sits at about 1,780 ft (545 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
1,780 ft 545 m
most residents: 1,560–2,010 ft
Lowest
1,350 ft 415 m
on the north side
Highest
2,230 ft 680 m
on the southwest side
Average
1,680 ft 515 m
all land inside township boundaries

Iona Township spans about 880 ft of height, so no single spot tells the whole story. The ruler shows where its people live, and where the other numbers you'll see come from.

FigureElevation
Typical
Where people live: half of residents higher, half lower
1,780 ft545 m
Highest point
Inside township boundaries, on the southwest side
2,230 ft680 m
Lowest point
Inside township boundaries, on the north side
1,350 ft415 m
Town center
USGS map point for Iona Township
1,810 ft555 m
Average of all land1,680 ft515 m

Elevation profile, south to north

11 mi south to north through the town center.

Topographic Map

Topographic elevation map of Iona Township, South Dakota, shaded from 1,350 ft on the north side to 2,230 ft on the southwest side
Township boundaries (dashed) over shaded terrain, with contours every 40 ft (12 m).
Location
Township in Lyman County, South Dakota, United States
Population
65 2024 est.
Land area
127.9 sq mi + 9.8 sq mi water
Density
0.5 per sq mi
Coordinates
43.5431° N, 99.4248° W
Time zone
Central UTC−6 / −5
Landform region
Great Plains
Drains to
Missouri River → Mississippi River → Gulf of America
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Sources: U.S. Census Bureau, USGS

Nearby Places

Nearby towns by typical elevation

  1. Dixon Township, Gregory County1,930 ft
  2. Condon Township1,860 ft
  3. Bull Creek Township1,840 ft
  4. Hamill1,790 ft
  5. Iona Township1,780 ft
  6. Roseland Township1,770 ft
  7. America Township1,770 ft
  8. Landing Creek Township1,770 ft
  9. Ola1,750 ft
  10. Ola Township1,730 ft
  11. Brule Township, Brule County1,670 ft

Rankings by typical elevation

Peaks and hills nearest, by height

  • Rattlesnake Butte, Tripp County2,280 ft
  • Twilight Butte2,230 ft
  • Buffalo Buttes2,210 ft
  • Twin Butte, Brule County2,040 ft
  • Red Rock1,800 ft
How we measure
  • Typical elevation: the population-weighted median: every 2020 Census block inside the township boundaries, at its USGS 3DEP height, weighted by the people who live there. Half of residents live higher, half lower.
  • Lowest, highest, average: USGS 3DEP bare-earth heights on a 1 arc-second (≈100 ft, 30 m) grid, land only, inside the Census township boundaries (TIGER, Jan 1 2026).
  • Nearby Places: nearby towns and rankings use each town's typical elevation, so every town is compared like for like. Rankings count every city, town, township and census-designated place, including places inside a town. Peaks and hills: the nearest summits with at least 980 ft (300 m) of prominence within 62 mi (100 km), then federal (GNIS) summits within 16 mi (25 km) 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).
  • 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 (FAA airport elevation, 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 (boundaries, 2020 blocks, 2024 population estimates, Gazetteer areas); BTS time zones. All public domain.