Brazoria County, TX Elevation & Topographic Map

Topographic elevation map of Brazoria County, Texas, shaded from sea level on Bastrop Bay to 140 ft on Damon Mound
Elevation
140 ft 45 m110 ft 35 m90 ft 27 m54 ft 16 m18 ft 5 m0 ft 0 m
Zoom in for contour lines
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

Brazoria County averages about 28 ft (8 m) above sea level across all its land. Its ground runs from sea level on Bastrop Bay to 140 ft on Damon Mound.

Average elevation
28 ft 8 m
all land inside the county
Highest
140 ft 45 m
on Damon Mound
Lowest
0 ft 0 m
at sea level on Bastrop Bay

Brazoria County spans about 140 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.

1% of Brazoria County's land lies below the average daily high tide (MHHW, NOAA), and 9% lies less than 3 ft above it. Check flood zones on FEMA's map

FigureElevation
Average of all land28 ft8 m
Highest point
Inside the county, on Damon Mound (3DEP terrain model; no NGS survey height)
140 ft45 m
Lowest point
Where the land meets Bastrop Bay
0 ft0 m

Elevation profile, south to north

50 mi south to north through Pearland.

Topographic Map

Topographic elevation map of Brazoria County, Texas, shaded from sea level on Bastrop Bay to 140 ft on Damon Mound
County boundary (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
County in Texas, United States
Population
413,224 2024 est.
Land area
1,363.3 sq mi + 245.3 sq mi water
Density
303 per sq mi
Time zone
Central UTC−6 / −5
Landform region
Coastal Plain 99%
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. Wharton County100 ft
  2. Fort Bend County86 ft
  3. Harris County85 ft
  4. Matagorda County28 ft
  5. Brazoria County28 ft
  6. Galveston County12 ft

Rankings by average elevation

  • Counties in Texas245th highest of 254
  • Counties in the United States3,072nd highest of 3,151

Peaks and hills highest inside

  • Damon Mound140 ft
  • Hoskins Mound33 ft
  • Rattlesnake Mound6 ft
All 28 towns in Brazoria County by typical elevation
  1. Damon99 ft
  2. Sandy Point56 ft
  3. Manvel55 ft
  4. Iowa Colony53 ft
  5. Pearland50 ft
  6. Brookside Village46 ft
  7. Rosharon45 ft
  8. Alvin39 ft
  9. Bonney37 ft
  10. Hillcrest Village35 ft
  11. Holiday Lakes33 ft
  12. West Columbia32 ft
  13. Sweeny29 ft
  14. East Columbia27 ft
  15. Angleton27 ft
  16. Bailey's Prairie26 ft
  17. Brazoria25 ft
  18. Wild Peach Village23 ft
  19. Danbury22 ft
  20. Liverpool18 ft
  21. Jones Creek14 ft
  22. Lake Jackson13 ft
  23. Richwood13 ft
  24. Clute12 ft
  25. Oyster Creek5 ft
  26. Quintana5 ft
  27. Surfside Beach4 ft
  28. Freeport2 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 2 arc-second (≈200 ft, 62 m) grid, coarsened from 1 arc-second so the whole area fits one run. Land means the boundary minus Census area water (on this grid, water areas of at least half a cell).
  • Highest and lowest: the highest land cell, re-read at 1 arc-second around the 25 highest grid cells; it is a named summit, so its height is the peak method: the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a survey mark sits within 160 ft (50 m) of it. Lowest: the lowest land cell, re-read at 1 arc-second around the 25 lowest grid cells; 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, −34 ft at 29.0726° N, 95.3621° W, is in such a hollow or patch and is not counted; this coastal land's lowest point is sea level on the coast.
  • 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; NOAA tidal surfaces (MHHW). All public domain.