Port Sulphur, LA Elevation & Topographic Map
Elevation
25 ft 8 m16 ft 5 m12 ft 4 m4 ft 1 m−4 ft −1 m−8 ft −3 m
Contours every 200 ft, bold every 1,000 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.
- Area
- Fades everything outside the official CDP boundary (US Census).
Elevation Data
Port Sulphur sits about 2 ft (0 m) below sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
−2 ft 0 m
most residents: −4–1 ft
Lowest
−8 ft −3 m
on the southeast side
Highest
15 ft 4 m
on the northwest side
Average
0 ft 0 m
all land inside the CDP boundary
Port Sulphur is nearly flat: its ground varies by only about 23 ft, so the figures below sit close together.
About 78% of residents live below sea level.
70% of Port Sulphur's land lies below the average daily high tide (MHHW, NOAA), and 20% lies less than 3 ft above it. Check flood zones on FEMA's map
| Figure | Elevation |
|---|---|
| Typical Where people live: half of residents higher, half lower | −2 ft0 m |
| Highest point Inside the CDP boundary, on the northwest side | 15 ft4 m |
| Lowest point Inside the CDP boundary, on the southeast side | −8 ft−3 m |
| Town center USGS map point for Port Sulphur | 3 ft1 m |
| Average of all land | 0 ft0 m |
Topographic Map
- Location
- Unincorporated community (census-designated place) in Plaquemines Parish, Louisiana, United States
- Population
- 1,677 2020 Census
- Land area
- 5.4 sq mi + 3.0 sq mi water
- Density
- 310 per sq mi
- Coordinates
- 29.4805° N, 89.6940° W
- Time zone
- Central UTC−6 / −5
- Landform region
- Coastal Plain
- Drains to
- Gulf of America
- ZIP codes 1
- 70083
⤓ Download this map
WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.
Sources: U.S. Census Bureau, USGS
Nearby Places
Nearby towns by typical elevation
- Poydras5 ft
- Grand Isle2 ft
- Delacroix1 ft
- Lafitte1 ft
- Pointe a la Hache−1 ft
- Port Sulphur−2 ft
- Empire−2 ft
- Triumph−4 ft
- Boothville−4 ft
- Buras−4 ft
- Venice−5 ft
Rankings by typical elevation
- Towns in Louisiana466th highest of 481
- Towns in Plaquemines Parish3rd highest of 9
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).
- 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.
- Port Sulphur 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); BTS time zones; NOAA tidal surfaces (MHHW). All public domain.