St. John the Baptist Parish, LA Elevation & Topographic Map
Elevation
52 ft 16 m39 ft 12 m32 ft 10 m19 ft 6 m6 ft 2 m0 ft 0 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
St. John the Baptist Parish averages about 4 ft (1 m) above sea level across all its land. Its ground runs from sea level on Knight Bay to 52 ft on the west side.
Average elevation
4 ft 1 m
all land inside the parish
Highest
52 ft 16 m
on the west side
Lowest
0 ft 0 m
at sea level on Knight Bay
St. John the Baptist Parish spans about 52 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.
6% of St. John the Baptist Parish's land lies below the average daily high tide (MHHW, NOAA), and 73% lies less than 3 ft above it. Check flood zones on FEMA's map
| Figure | Elevation |
|---|---|
| Average of all land | 4 ft1 m |
| Highest point Inside the parish, on the west side | 52 ft16 m |
| Lowest point Where the land meets Knight Bay | 0 ft0 m |
Elevation profile, west to east
15 mi west to east through Laplace.
Topographic Map
- Location
- Parish in Louisiana, United States
- Population
- 39,694 2024 est.
- Land area
- 214.5 sq mi + 195.5 sq mi water
- Density
- 185 per sq mi
- Time zone
- Central UTC−6 / −5
- Landform region
- Coastal Plain
- Drains to
- Gulf of America
⤓ 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
Neighboring parishes sharing a border, by average
- Tangipahoa Parish120 ft
- St. Tammany Parish45 ft
- Livingston Parish33 ft
- Ascension Parish10 ft
- St. James Parish5 ft
- St. John the Baptist Parish4 ft
- St. Charles Parish2 ft
- Lafourche Parish1 ft
- Jefferson Parish0 ft
Rankings by average elevation
- Parishes in Louisiana55th highest of 63
- Counties in the United States3,139th highest of 3,151
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, −21 ft at 30.0199° N, 90.6149° 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 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.