Rock Falls, IL Elevation & Topographic Map

Topographic elevation map of Rock Falls, Illinois, shaded from 610 ft on the west side to 660 ft near the middle
Elevation
670 ft 205 m650 ft 200 m640 ft 195 m630 ft 190 m620 ft 190 m610 ft 185 m
Contours every 100 ft, bold every 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.
City area
Fades everything outside the official city limits (US Census).

Elevation Data

Rock Falls sits at about 640 ft (195 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
640 ft 195 m
most residents: 640–650 ft
Lowest
610 ft 185 m
on the west side
Highest
660 ft 205 m
near the middle
Average
640 ft 195 m
all land inside city limits

Rock Falls spans about 50 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
640 ft195 m
Highest point
Inside city limits, near the middle
660 ft205 m
Lowest point
Inside city limits, on the west side
610 ft185 m
Town center
USGS map point for Rock Falls
640 ft195 m
Airport (SQI)
FAA airport elevation, the highest point of its runways, 0.9 mi south of the city limits
648 ft198 m
Average of all land640 ft195 m

Elevation profile, west to east

3.7 mi west to east through the town center.

Topographic Map

Topographic elevation map of Rock Falls, Illinois, shaded from 610 ft on the west side to 660 ft near the middle
City limits (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
City in Whiteside County, Illinois, United States
Population
8,614 2024 est.
Land area
4.0 sq mi + 0.1 sq mi water
Density
2,163 per sq mi
Coordinates
41.7798° N, 89.6890° W
Time zone
Central UTC−6 / −5
Landform region
Central Lowland
Drains to
Rock River → Mississippi River → Gulf of America
Airport
Whiteside County/Jos H Bittorf Field (SQI) 648 ft
ZIP codes 1
61071
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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. Jordan Township730 ft
  2. Sterling Township680 ft
  3. Sterling670 ft
  4. Nelson Township660 ft
  5. Nelson650 ft
  6. Montmorency Township650 ft
  7. Hopkins Township640 ft
  8. Coloma Township640 ft
  9. Rock Falls640 ft
  10. Galt640 ft
  11. Como620 ft

Rankings by typical elevation

Peaks and hills nearest, by height

  • Thunderbolt Hill670 ft
How we measure
  • Typical elevation: the population-weighted median: every 2020 Census block inside the city limits, 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 city limits (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, ZIP code areas); FAA airport data; BTS time zones. All public domain.