Slidell, LA Elevation & Topographic Map

Topographic elevation map of Slidell, Louisiana, shaded from sea level level on Bayou Bonfouca to 35 ft on the northwest side
Elevation
35 ft 11 m26 ft 8 m22 ft 7 m13 ft 4 m4 ft 1 m0 ft 0 m
Contours every 200 ft, bold every 1,000 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.
City area
Fades everything outside the official city limits (US Census).

Elevation Data

Slidell sits at about 10 ft (3 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
10 ft 3 m
most residents: 4–18 ft
Lowest
0 ft 0 m
at sea level on Bayou Bonfouca
Highest
35 ft 11 m
on the northwest side
Average
12 ft 4 m
all land inside city limits

Slidell spans about 35 ft of height, so no single spot tells the whole story. The ruler shows where its people live, and where the other numbers you'll see come from.

Under 1% of Slidell's land lies below the average daily high tide (MHHW, NOAA), and 6% lies less than 3 ft above it. Check flood zones on FEMA's map

FigureElevation
Typical
Where people live: half of residents higher, half lower
10 ft3 m
Highest point
Inside city limits, on the northwest side
35 ft11 m
Lowest point
Where the land meets Bayou Bonfouca
0 ft0 m
Town center
USGS map point for Slidell
6 ft2 m
Airport (ASD)
FAA airport elevation, the highest point of its runways
28 ft9 m
Average of all land12 ft4 m

Topographic Map

Topographic elevation map of Slidell, Louisiana, shaded from sea level level on Bayou Bonfouca to 35 ft on the northwest side
City limits (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
City in St. Tammany Parish, Louisiana, United States
Population
28,440 2024 est.
Land area
15.2 sq mi + 0.4 sq mi water
Density
1,868 per sq mi
Coordinates
30.2752° N, 89.7812° W
Time zone
Central UTC−6 / −5
Landform region
Coastal Plain
Drains to
Gulf of America
Airport
Slidell (ASD) 28 ft
ZIP codes 3
70458 70460 70461
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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. Hide-A-Way Lake, MS100 ft
  2. Picayune, MS57 ft
  3. Nicholson, MS48 ft
  4. Abita Springs28 ft
  5. Pearl River27 ft
  6. Lacombe15 ft
  7. Mandeville12 ft
  8. Slidell10 ft
  9. Lewisburg7 ft
  10. Pearlington, MS7 ft
  11. Eden Isle6 ft

Rankings by typical elevation

How we measure
  • Typical elevation: the population-weighted median: every 2020 Census block inside the city limits, 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 city limits (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, −4 ft at 30.2182° N, 89.7768° 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: 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.
  • Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (boundaries, 2020 blocks, 2024 population estimates, Gazetteer areas, ZIP code areas); FAA airport data; BTS time zones; NOAA tidal surfaces (MHHW). All public domain.