Polk Township, IL Elevation & Topographic Map

Topographic elevation map of Polk Township, Illinois, shaded from 500 ft on the west side to 630 ft on the southeast side
Elevation
630 ft 190 m600 ft 180 m580 ft 175 m550 ft 170 m520 ft 160 m500 ft 155 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.
Township area
Fades everything outside the official township boundaries (US Census).

Elevation Data

Polk Township sits at about 600 ft (185 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
600 ft 185 m
most residents: 540–610 ft
Lowest
500 ft 155 m
on the west side
Highest
630 ft 190 m
on the southeast side
Average
590 ft 180 m
all land inside township boundaries

Polk Township spans about 130 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
600 ft185 m
Highest point
Inside township boundaries, on the southeast side
630 ft190 m
Lowest point
Inside township boundaries, on the west side
500 ft155 m
Average of all land590 ft180 m

Elevation profile, west to east

6.0 mi west to east through the middle of Polk Township.

Topographic Map

Topographic elevation map of Polk Township, Illinois, shaded from 500 ft on the west side to 630 ft on the southeast side
Township boundaries (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
Township in Macoupin County, Illinois, United States
Population
570 2024 est.
Land area
35.9 sq mi + 0.2 sq mi water
Density
16 per sq mi
Coordinates
39.2034° N, 89.9688° W
Time zone
Central UTC−6 / −5
Landform region
Central Lowland
Drains to
Macoupin Creek → Illinois River → Mississippi River → Gulf of America
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Sources: U.S. Census Bureau, USGS

Nearby Places

Nearby towns by typical elevation

  1. Royal Lakes640 ft
  2. Hillyard Township630 ft
  3. Shipman630 ft
  4. Brushy Mound Township630 ft
  5. Shipman Township620 ft
  6. Carlinville Township620 ft
  7. Carlinville620 ft
  8. Bird Township610 ft
  9. Polk Township600 ft
  10. Chesterfield590 ft
  11. Chesterfield Township590 ft

Rankings by typical elevation

Peaks and hills nearest, by height

  • Brushy Mound700 ft
  • Coops Mound690 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).
  • 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, 500 ft at 39.2010° N, 90.0349° W, is in such a hollow or patch and is not counted.
  • 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.