Williamson County, TX Elevation & Topographic Map

Topographic elevation map of Williamson County, Texas, shaded from 400 ft on the east side to 1,370 ft on the west side
Elevation
1,370 ft 420 m1,130 ft 345 m1,010 ft 310 m770 ft 235 m530 ft 160 m400 ft 125 m
Contours every 500 ft, bold every 2,500 ft
USGS 3DEP · U.S. Census Bureau
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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

Williamson County averages about 760 ft (230 m) above sea level across all its land. Its ground runs from 400 ft on the east side to 1,370 ft on the west side.

Average elevation
760 ft 230 m
all land inside the county
Highest
1,370 ft 420 m
on the west side
Lowest
400 ft 125 m
on the east side

Williamson County spans about 970 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.

FigureElevation
Average of all land760 ft230 m
Highest point
Inside the county, on the west side
1,370 ft420 m
Lowest point
Inside the county, on the east side
400 ft125 m

Elevation profile, west to east

40 mi west to east through Round Rock.

Topographic Map

Topographic elevation map of Williamson County, Texas, shaded from 400 ft on the east side to 1,370 ft on the west side
County boundary (dashed) over shaded terrain, with contours every 100 ft (30 m).
Location
County in Texas, United States
Population
727,480 2024 est.
Land area
1,115.9 sq mi + 16.0 sq mi water
Density
652 per sq mi
Time zone
Central UTC−6 / −5
Landform regions
Great Plains 65%, Coastal Plain 35%
Drains to
Gulf of America
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Burnet County1,160 ft
  2. Williamson County760 ft
  3. Travis County730 ft
  4. Bell County670 ft
  5. Bastrop County470 ft
  6. Lee County410 ft
  7. Milam County410 ft

Rankings by average elevation

  • Counties in Texas139th highest of 254
  • Counties in the United States1,903rd highest of 3,151

Peaks and hills highest inside

  • Pilot Knob, Williamson County1,209 ft
  • Bald Knob, Williamson County1,170 ft
  • Barnett Knob1,160 ft
  • Tucker Knob1,150 ft
  • Hickman Knob1,110 ft
All 21 towns in Williamson County by typical elevation
  1. Santa Rita Ranch1,050 ft
  2. Liberty Hill1,020 ft
  3. Leander1,010 ft
  4. Florence990 ft
  5. Cedar Park940 ft
  6. Sonterra870 ft
  7. Jarrell860 ft
  8. Brushy Creek840 ft
  9. Serenada800 ft
  10. Georgetown790 ft
  11. Round Rock750 ft
  12. Pflugerville partly750 ft
  13. Weir680 ft
  14. Austin partly670 ft
  15. Hutto650 ft
  16. Bartlett600 ft
  17. Taylor590 ft
  18. Granger570 ft
  19. Thrall560 ft
  20. Coupland540 ft
  21. Thorndale partly450 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, 400 ft at 30.5868° N, 97.2096° 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.