Rockwall County, TX Elevation & Topographic Map
Elevation
620 ft 190 m570 ft 175 m550 ft 170 m500 ft 155 m450 ft 140 m430 ft 130 m
Contours every 200 ft, bold every 1,000 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
Rockwall County averages about 530 ft (160 m) above sea level across all its land. Its ground runs from 430 ft on the southwest side to 620 ft on the north side.
Average elevation
530 ft 160 m
all land inside the county
Highest
620 ft 190 m
on the north side
Lowest
430 ft 130 m
on the southwest side
Rockwall County spans about 190 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 | 530 ft160 m |
| Highest point Inside the county, on the north side | 620 ft190 m |
| Lowest point Inside the county, on the southwest side | 430 ft130 m |
Elevation profile, west to east
13 mi west to east through Rockwall.
Topographic Map
- Location
- County in Texas, United States
- Population
- 137,044 2024 est.
- Land area
- 127.2 sq mi + 21.7 sq mi water
- Density
- 1,077 per sq mi
- Time zone
- Central UTC−6 / −5
- Landform region
- Coastal Plain
- Drains to
- Gulf of America
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Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Collin County630 ft
- Hunt County550 ft
- Rockwall County530 ft
- Dallas County520 ft
- Kaufman County430 ft
Rankings by average elevation
- Counties in Texas157th highest of 254
- Counties in the United States2,290th highest of 3,151
All 9 towns in Rockwall County by typical elevation
- Mobile City590 ft
- Fate580 ft
- Royse City550 ft
- Dallas partly540 ft
- Wylie partly530 ft
- McLendon-Chisholm530 ft
- Rockwall530 ft
- Heath500 ft
- Rowlett partly480 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.
- 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.