Alpha, IL Elevation & Topographic Map
Elevation
820 ft 250 m810 ft 250 m810 ft 245 m800 ft 245 m790 ft 240 m790 ft 240 m
Contours every 40 ft, bold every 200 ft
USGS 3DEP · U.S. Census Bureau
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.
- Village area
- Fades everything outside the official village limits (US Census).
Elevation Data
Alpha sits at about 800 ft (245 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
800 ft 245 m
most residents: 790–800 ft
Lowest
790 ft 240 m
on the southwest side
Highest
810 ft 245 m
on the east side
Average
800 ft 245 m
all land inside village limits
Alpha is nearly flat: its ground varies by only about 20 ft, so the figures below sit close together.
| Figure | Elevation |
|---|---|
| Typical Where people live: half of residents higher, half lower | 800 ft245 m |
| Highest point Inside village limits, on the east side | 810 ft245 m |
| Lowest point Inside village limits, on the southwest side | 790 ft240 m |
| Town center USGS map point for Alpha | 800 ft245 m |
| Average of all land | 800 ft245 m |
Topographic Map
- Location
- Village in Henry County, Illinois, United States
- Population
- 653 2024 est.
- Land area
- 0.3 sq mi
- Density
- 2,093 per sq mi
- Coordinates
- 41.1917° N, 90.3801° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Central Lowland
- Drains to
- Pope Creek → Mississippi River → Gulf of America
- ZIP codes 1
- 61413
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Sources: U.S. Census Bureau, USGS
Nearby Places
Nearby towns by typical elevation
- Woodhull820 ft
- Clover Township820 ft
- Alpha800 ft
- Oxford Township800 ft
- Village of Windsor800 ft
- Rivoli Township800 ft
- Rio780 ft
- Rio Township780 ft
- Lynn Township740 ft
- Swedona720 ft
- Ophiem700 ft
Rankings by typical elevation
- Towns in Illinois256th highest of 2,872
- Towns in Henry County9th highest of 42
Peaks and hills nearest, by height
- Pilot Knob, Knox County880 ft
How we measure
- Typical elevation: the population-weighted median: every 2020 Census block inside the village 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 village 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); BTS time zones. All public domain.