O'Donnell, TX Elevation & Topographic Map

Topographic elevation map of O'Donnell, Texas, shaded from 3,040 ft on the southwest side to 3,050 ft on the northeast side
Elevation
3,070 ft 935 m3,060 ft 935 m3,060 ft 930 m3,050 ft 930 m3,040 ft 925 m3,040 ft 925 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

O'Donnell sits at about 3,050 ft (930 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
3,050 ft 930 m
nearly all residents at this height
Lowest
3,040 ft 925 m
on the southwest side
Highest
3,050 ft 930 m
on the northeast side
Average
3,050 ft 930 m
all land inside city limits

O'Donnell is nearly flat: its ground varies by only about 10 ft, so the figures below sit close together.

FigureElevation
Typical
Where people live: half of residents higher, half lower
3,050 ft930 m
Highest point
Inside city limits, on the northeast side
3,050 ft930 m
Lowest point
Inside city limits, on the southwest side
3,040 ft925 m
Town center
USGS map point for O'Donnell
3,050 ft930 m
Average of all land3,050 ft930 m

Altitude Effects

What 3,050 ft means day to day, worked out from the typical elevation.

Water boils at
206.3 °F96.9 °C

vs 212 °F at sea level; USDA: food takes longer to cook.

Air pressure
89% of sea level

26.8 inHg (90.7 kPa): each breath holds 11% less air.

Oxygen equivalent
18.7% at sea level

Air is still 21% oxygen, just thinner. Normal at the coast: 20.9%.

Sunburn
+6% more UV

EPA: UV rises about 2% for every 1,000 ft.

Topographic Map

Topographic elevation map of O'Donnell, Texas, shaded from 3,040 ft on the southwest side to 3,050 ft on the northeast side
City limits (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
City in Lynn and Dawson counties, Texas, United States
Population
740 2024 est.
Land area
0.9 sq mi
Density
860 per sq mi
Coordinates
32.9637° N, 101.8327° W
Time zone
Central UTC−6 / −5
Landform region
Great Plains
Drains to
Tobacco Creek → Colorado River → Gulf of America
ZIP codes 1
79351
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Sources: U.S. Census Bureau, USGS

Nearby Places

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).
  • Altitude effects: standard-atmosphere formulas applied to the typical elevation; UV from EPA's rule of thumb (about 2% per 1,000 ft).
  • 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.