Thornburg, IA Elevation & Topographic Map
Elevation
880 ft 270 m880 ft 265 m870 ft 265 m860 ft 265 m850 ft 260 m850 ft 260 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.
- City area
- Fades everything outside the official city limits (US Census).
Elevation Data
Thornburg sits at about 880 ft (265 m) above sea level, the median height of all land inside city limits (too few residents to weight by).
Typical elevation (all land)
880 ft 265 m
few residents
Lowest
850 ft 260 m
on the south side
Highest
880 ft 270 m
on the northeast side
Average
870 ft 265 m
all land inside city limits
Thornburg spans about 30 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.
| Figure | Elevation |
|---|---|
| Typical (all land) Median of all land; too few residents to weight by | 880 ft265 m |
| Highest point Inside city limits, on the northeast side | 880 ft270 m |
| Lowest point Inside city limits, on the south side | 850 ft260 m |
| Town center USGS map point for Thornburg | 880 ft265 m |
| Average of all land | 870 ft265 m |
Topographic Map
- Location
- City in Keokuk County, Iowa, United States
- Population
- 46 2024 est.
- Land area
- 0.2 sq mi
- Density
- 231 per sq mi
- Coordinates
- 41.4547° N, 92.3357° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Central Lowland
- Drains to
- Mississippi River → Gulf of America
- ZIP codes 1
- 50255
⤓ Download this map
WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.
Sources: U.S. Census Bureau, USGS
Nearby Places
Nearby towns by typical elevation
- Barnes City900 ft
- Deep River890 ft
- Gibson890 ft
- Thornburg880 ft
- Millersburg870 ft
- Keswick870 ft
- Webster860 ft
- Rose Hill810 ft
- Delta800 ft
- What Cheer790 ft
- Sigourney780 ft
Rankings by typical elevation
- Towns in Iowa752nd highest of 1,026
- Towns in Keokuk County2nd highest of 16
How we measure
- Typical elevation: the median height of all land inside the city limits; too few residents live here to weight by people.
- 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); BTS time zones. All public domain.