Assumption Parish, LA Elevation & Topographic Map

Topographic elevation map of Assumption Parish, Louisiana, shaded from 1 ft below sea level on the south side to 61 ft on the north side
Elevation
61 ft 19 m45 ft 14 m37 ft 11 m22 ft 7 m6 ft 2 m−1 ft 0 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.
Parish area
Fades everything outside the official parish boundary (US Census).

Elevation Data

Assumption Parish averages about 4 ft (1 m) above sea level across all its land. Its ground runs from 1 ft below sea level on the south side to 61 ft on the north side.

Average elevation
4 ft 1 m
all land inside the parish
Highest
61 ft 19 m
on the north side
Lowest
−1 ft 0 m
on the south side

Assumption Parish spans about 62 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.

21% of Assumption Parish's land lies below the average daily high tide (MHHW, NOAA), and 48% lies less than 3 ft above it. Check flood zones on FEMA's map

FigureElevation
Average of all land4 ft1 m
Highest point
Inside the parish, on the north side
61 ft19 m
Lowest point
Inside the parish, on the south side
−1 ft0 m

Topographic Map

Topographic elevation map of Assumption Parish, Louisiana, shaded from 1 ft below sea level on the south side to 61 ft on the north side
Parish boundary (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
Parish in Louisiana, United States
Population
20,050 2024 est.
Land area
344.0 sq mi + 25.9 sq mi water
Density
58 per sq mi
Time zone
Central UTC−6 / −5
Landform region
Coastal Plain
Drains to
Gulf of America
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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

Nearby Places

Neighboring parishes sharing a border, by average

  1. St. Martin Parish11 ft
  2. Iberville Parish10 ft
  3. Ascension Parish10 ft
  4. Iberia Parish6 ft
  5. St. James Parish5 ft
  6. Assumption Parish4 ft
  7. St. Mary Parish3 ft
  8. Lafourche Parish1 ft
  9. Terrebonne Parish1 ft

Rankings by average elevation

All 8 towns in Assumption Parish by typical elevation
  1. Napoleonville16 ft
  2. Paincourtville14 ft
  3. Belle Rose14 ft
  4. Labadieville12 ft
  5. Supreme10 ft
  6. Pierre Part3 ft
  7. Bayou Corne2 ft
  8. Bayou L'Ourse2 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 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, −23 ft at 30.0310° N, 91.0996° 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.