Irion County, TX Elevation & Topographic Map
Elevation
2,750 ft 835 m2,560 ft 780 m2,460 ft 750 m2,270 ft 690 m2,080 ft 635 m1,990 ft 605 m
Contours every 500 ft, bold every 2,500 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.
- County area
- Fades everything outside the official county boundary (US Census).
Elevation Data
Irion County averages about 2,410 ft (735 m) above sea level across all its land. Its ground runs from 1,990 ft on the northeast side to 2,750 ft on the west side.
Average elevation
2,410 ft 735 m
all land inside the county
Highest
2,750 ft 835 m
on the west side
Lowest
1,990 ft 605 m
on the northeast side
Irion County spans about 760 ft of height, so no single spot tells the whole story. The ruler shows where most of its land lies, and where the other numbers you'll see come from.
| Figure | Elevation |
|---|---|
| Average of all land | 2,410 ft735 m |
| Highest point Inside the county, on the west side | 2,750 ft835 m |
| Lowest point Inside the county, on the northeast side | 1,990 ft605 m |
Elevation profile, west to east
34 mi west to east through Mertzon.
Topographic Map
- Location
- County in Texas, United States
- Population
- 1,526 2024 est.
- Land area
- 1,051.5 sq mi + 0.1 sq mi water
- Density
- 1.5 per sq mi
- Time zone
- Central UTC−6 / −5
- Landform region
- Great Plains
- Drains to
- Gulf of America
⤓ Download this map
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Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Reagan County2,660 ft
- Crockett County2,430 ft
- Irion County2,410 ft
- Schleicher County2,370 ft
- Tom Green County2,070 ft
Rankings by average elevation
- Counties in Texas61st highest of 254
- Counties in the United States506th highest of 3,151
Peaks and hills highest inside
- Ketchum Mountain2,740 ft
- Johnson Hill, Irion County2,700 ft
- Cedar Hill, Irion County2,620 ft
- Lopez Peaks2,593 ft
- High Point Hill2,480 ft
The one town in Irion County
- Mertzon2,220 ft
How we measure
- Average: every USGS 3DEP bare-earth cell of land inside the Census county boundary (TIGER/Line, Jan 1 2026), weighted equally, on a 1 arc-second (≈100 ft, 30 m) grid. Land means the boundary minus Census area water.
- Highest and lowest: the highest land cell. Lowest: the lowest land cell; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
- 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, 1,980 ft at 31.4224° N, 100.6937° W, is in such a hollow or patch and is not counted.
- Nearby Places: neighboring counties and rankings use each one's average elevation, on its own grid, the same figure its page shows. Peaks and hills: the highest summits inside the county with at least 980 ft (300 m) of prominence, then the highest federal (GNIS) summits inside it 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).
- Towns: each town's typical elevation (population-weighted median of its own 2020 blocks at 1 arc-second); a town is listed when any of its 2020 residents live in the county.
- 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 (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 (TIGER boundaries and water, 2020 blocks, 2024 population estimates, county adjacency); NOAA NGS survey heights; BTS time zones. All public domain.