Sebastian, TX Elevation & Topographic Map

Topographic elevation map of Sebastian, Texas, shaded from 35 ft on the north side to 58 ft on the north side
Elevation
68 ft 21 m59 ft 18 m55 ft 17 m47 ft 14 m39 ft 12 m35 ft 11 m
Contours every 40 ft, bold every 200 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.
Area
Fades everything outside the official CDP boundary (US Census).

Elevation Data

Sebastian sits at about 39 ft (12 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
39 ft 12 m
most residents: 37–41 ft
Lowest
35 ft 11 m
on the north side
Highest
58 ft 18 m
on the north side
Average
39 ft 12 m
all land inside the CDP boundary

Sebastian is nearly flat: its ground varies by only about 23 ft, so the figures below sit close together.

FigureElevation
Typical
Where people live: half of residents higher, half lower
39 ft12 m
Highest point
Inside the CDP boundary, on the north side
58 ft18 m
Lowest point
Inside the CDP boundary, on the north side
35 ft11 m
Town center
USGS map point for Sebastian
39 ft12 m
Airport (HRL)
FAA airport elevation, the highest point of its runways, 11 mi southeast of the CDP boundary
36 ft11 m
Average of all land39 ft12 m

Topographic Map

Topographic elevation map of Sebastian, Texas, shaded from 35 ft on the north side to 58 ft on the north side
CDP boundary (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
Unincorporated community (census-designated place) in Willacy County, Texas, United States
Population
1,684 2020 Census
Land area
1.7 sq mi
Density
1,010 per sq mi
Coordinates
26.3428° N, 97.7903° W
Time zone
Central UTC−6 / −5
Landform region
Coastal Plain
Drains to
Gulf of America
Airport
Valley International (HRL) 36 ft
ZIP codes 1
78594
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WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.

Sources: U.S. Census Bureau, USGS, FAA

Nearby Places

Nearby towns by typical elevation

  1. La Villa57 ft
  2. Laguna Seca56 ft
  3. Santa Rosa50 ft
  4. Tierra Bonita48 ft
  5. Yznaga45 ft
  6. Primera42 ft
  7. Zapata Ranch39 ft
  8. Sebastian39 ft
  9. Combes38 ft
  10. Lyford35 ft
  11. Lasana33 ft

Rankings by typical elevation

Peaks and hills nearest, by height

  • Harmony Hill97 ft
  • Sunrise Hill79 ft
How we measure
  • Typical elevation: the population-weighted median: every 2020 Census block inside the CDP boundary, 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 CDP boundary (TIGER, Jan 1 2026).
  • 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 26.3501° N, 97.7893° W, is in such a hollow or patch and is not counted.
  • 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).
  • 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.
  • Sebastian is an unincorporated community; figures cover the census-designated place, a statistical area.
  • Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (boundaries, 2020 blocks, Gazetteer areas, ZIP code areas); FAA airport data; BTS time zones. All public domain.