Terrebonne Parish, LA Elevation & Topographic Map
Elevation
23 ft 7 m13 ft 4 m8 ft 2 m−2 ft −1 m−12 ft −4 m−17 ft −5 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.
- Parish area
- Fades everything outside the official parish boundary (US Census).
Elevation Data
Terrebonne Parish averages about 1 ft (0 m) above sea level across all its land. Its ground runs from 17 ft below sea level near the middle to 23 ft on the north side.
Average elevation
1 ft 0 m
all land inside the parish
Highest
23 ft 7 m
on the north side
Lowest
−17 ft −5 m
near the middle
Terrebonne Parish spans about 40 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.
75% of Terrebonne Parish's land lies below the average daily high tide (MHHW, NOAA), and 21% lies less than 3 ft above it. Check flood zones on FEMA's map
| Figure | Elevation |
|---|---|
| Average of all land | 1 ft0 m |
| Highest point Inside the parish, on the north side | 23 ft7 m |
| Lowest point Inside the parish, near the middle | −17 ft−5 m |
Topographic Map
- Location
- Parish in Louisiana, United States
- Population
- 103,864 2024 est.
- Land area
- 1,229.9 sq mi + 852.4 sq mi water
- Density
- 84 per sq mi
- Time zone
- Central UTC−6 / −5
- Landform region
- Coastal Plain 91%
- Drains to
- Gulf of America
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Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring parishes sharing a border, by average
- Assumption Parish4 ft
- St. Mary Parish3 ft
- Lafourche Parish1 ft
- Terrebonne Parish1 ft
Rankings by average elevation
- Parishes in Louisiana61st highest of 63
- Counties in the United States3,149th highest of 3,151
All 9 towns in Terrebonne Parish by typical elevation
- Schriever9 ft
- Gray7 ft
- Presquille7 ft
- Bayou Cane5 ft
- Bayou Blue partly4 ft
- Bourg1 ft
- Montegut1 ft
- Chauvin1 ft
- Dulac−2 ft
How we measure
- Average: every USGS 3DEP bare-earth cell of land inside the Census parish 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. 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, −20 ft at 29.5093° N, 90.5779° W, is in such a hollow or patch and is not counted.
- Nearby Places: neighboring parishes 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 parish 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 parish.
- 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.