Alto Township, IL Elevation & Topographic Map

Topographic elevation map of Alto Township, Illinois, shaded from 780 ft on the northwest side to 970 ft on the southeast side
Elevation
970 ft 295 m920 ft 280 m900 ft 275 m850 ft 260 m800 ft 245 m780 ft 235 m
Contours every 200 ft, bold every 1,000 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

Alto Township sits at about 830 ft (250 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
830 ft 250 m
most residents: 820–920 ft
Lowest
780 ft 235 m
on the northwest side
Highest
970 ft 295 m
on the southeast side
Average
860 ft 260 m
all land inside township boundaries

Alto Township spans about 190 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
830 ft250 m
Highest point
Inside township boundaries, on the southeast side
970 ft295 m
Lowest point
Inside township boundaries, on the northwest side
780 ft235 m
Airport (RPJ)
FAA airport elevation, the highest point of its runways, 1.3 mi northwest of the township boundaries
781 ft238 m
Average of all land860 ft260 m

Elevation profile, west to east

5.8 mi west to east through the middle of Alto Township.

Topographic Map

Topographic elevation map of Alto Township, Illinois, shaded from 780 ft on the northwest side to 970 ft on the southeast side
Township boundaries (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
Township in Lee County, Illinois, United States
Population
518 2024 est.
Land area
34.9 sq mi
Density
15 per sq mi
Coordinates
41.8435° N, 89.0045° W
Time zone
Central UTC−6 / −5
Landform region
Central Lowland
Drains to
Rock River → Mississippi River → Gulf of America
Airport
Rochelle Municipal/Koritz Field (RPJ) 781 ft
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WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.

Sources: U.S. Census Bureau, USGS, FAA

Nearby Places

Nearby towns by typical elevation

  1. Lee940 ft
  2. Willow Creek Township930 ft
  3. Creston910 ft
  4. Dement Township900 ft
  5. Milan Township890 ft
  6. Alto Township830 ft
  7. Steward820 ft
  8. Flagg Township800 ft
  9. Rochelle800 ft
  10. Viola Township790 ft
  11. Reynolds Township780 ft

Rankings by typical elevation

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); FAA airport data; BTS time zones. All public domain.