Slidell, LA GIS Map
Slidell is a city in St. Tammany Parish, Louisiana, with a population of about 28,516. The map below shows its location, boundary and surrounding roads, with federal GIS layers you can turn on for the area.
- County
- St. Tammany Parish
- Population
- 28,516
- Elevation
- 6 ft
- Coordinates
- 30.2752, -89.7812
- ZIP codes (5)
- 70458, 70459, 70460, 70461, 70469
- Land area
- 15.2 sq mi
- Time zone
- America/Chicago
About Slidell, LA
Slidell is a city on the northeast shore of Lake Pontchartrain in St. Tammany Parish, Louisiana, United States. The population was 28,781 at the 2020 census, making it the sixteenth-most populous city in Louisiana. It is part of the New Orleans−Metairie−Kenner metropolitan statistical area.
Source: Wikipedia (CC BY-SA 4.0)
Cities Near Slidell
- Mandeville, LA18 mi
- Picayune, MS18 mi
- Covington, LA24 mi
- Bay St. Louis, MS27 mi
- New Orleans, LA28 mi
- Metairie, LA30 mi
- Kenner, LA34 mi
- Bogalusa, LA36 mi
Other Cities in St. Tammany County
GIS Data for Slidell, LA
The Slidell map loads live federal GIS layers in your browser, so you can check flood zones, terrain, land cover and district boundaries for any address in Slidell without a separate GIS login. Everything below is drawn from public U.S. government data.
Layers you can turn on
FEMA flood zones
National Flood Hazard Layer — flood insurance rate map zones.
Elevation contours and hillshade
USGS 3DEP terrain, so you can read slope and relief.
Land cover
NLCD land cover classes — forest, developed, wetland, water.
School districts
Census TIGER unified and elementary school district boundaries.
ZIP code and county boundaries
Census TIGER ZCTA and county boundary lines.
Map tools
Measure distance and area
Draw a line or polygon to get length in miles or area in acres.
Sketch and annotate
Add points, lines and shapes on top of the map.
Inspect any point
Click the map to read coordinates, elevation and the layers under your cursor.
Download the map
Save the current view as a PNG image.
Slidell Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
28,561
Households
10,995
Median household income
$70,497
Median age
38.9 years
Median home value
$217,700
Median gross rent
$1,375/mo
Owner-occupied homes
68.5%
Bachelor's degree or higher
31.4%
Below poverty level
15.7%
Land area
15.2 sq mi
Population density
1,877 / sq mi
County
Slidell Population Growth
Source: U.S. Census Bureau, 2010 Census and Population Estimates Program (Vintage 2024: April 2020 estimates base and July 1, 2024 estimate).
2010 Census
27,068
April 2020 (estimates base)
28,688
July 2024 estimate
28,440
Change 2010-2020
+6.0%
Change 2020-2024
-0.9%
Photos of Slidell
Hover over a photo to see it larger. Tap on mobile.
Photos from Wikimedia Commons, taken in or near Slidell. Credits and licenses are shown in the larger view.
Federal Buildings & Leases in Slidell
GSA-managed federal properties in and around Slidell.
| Property | Address | Status | Sq ft | Lease ends |
|---|---|---|---|---|
| Northshore Business Park | Building #3 124 Kingspoint Boulevard, 70461 | Leased | 5,280 | Apr 2034 |
| State Machinery And Equipment | 62512 Airport Rd Building 22, 70460 | Leased | 3,115 | Jan 2041 |
Source: U.S. GSA Inventory of Owned and Leased Properties (data.gov), September 2026.
Soils of Slidell
General soil map unit at the city center: Guyton-Arat
Soil Properties
- Drainage class
- Very poorly drained
- Hydrologic soil group
- D (very slow infiltration, high runoff)
- Available water storage (0–150 cm)
- 29.6 cm
- Typical slope
- 1%
- Flooding frequency
- Frequent
- Min. annual water table depth
- 0 cm
Soil Components
- Arat67%
Entisols · Typic Hydraquents
- Guyton14%
Alfisols · Typic Glossaqualfs
- Water5%
- Rosebloom4%
Inceptisols · Fluvaquentic Endoaquepts
- Arkabutla4%
Inceptisols · Fluventic Endoaquepts
- Larose2%
Entisols · Typic Hydraquents
Source: USDA NRCS U.S. General Soil Map (STATSGO2). General soil map data (1:250,000 scale) is not suitable for site-specific decisions.
Climate of Slidell
30-year averages (1991–2020) from the Slidell, La weather station, elevation 10 ft, 1 miles from the city center.
Warmest month
Jul · avg high 90°F
Coldest month
Jan · avg low 42°F
Annual precipitation
66.2 in
Annual snowfall
0.1 in
Average Monthly Temperatures (°F)
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 61 | 64 | 70 | 76 | 83 | 88 | 90 | 90 | 87 | 79 | 70 | 63 |
| Avg low °F | 42 | 45 | 52 | 58 | 66 | 72 | 74 | 74 | 70 | 59 | 49 | 44 |
| Precip. in | 5.92 | 4.39 | 5.26 | 5.47 | 5.84 | 5.75 | 7.68 | 7.57 | 4.95 | 4.17 | 4.22 | 4.95 |
| Snow in | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Source: NOAA NCEI U.S. Climate Normals, 1991–2020. Conditions at the station may differ from other parts of the city.
Natural Hazard Risk in Slidell
FEMA National Risk Index ratings for St. Tammany Parish, compared with all U.S. counties.
Overall risk
Score 96.6 of 100
Expected annual loss
Buildings, population & agriculture
Social vulnerability
Susceptibility to hazard impacts
Community resilience
Ability to prepare & recover
Risk by Hazard
- HurricaneVery High
- Heat WaveRelatively Moderate
- LightningRelatively High
- Inland FloodingRelatively High
- Cold WaveRelatively High
- WildfireRelatively Moderate
- HailRelatively Moderate
- TornadoRelatively Moderate
- Coastal FloodingRelatively High
- Strong WindRelatively Moderate
- DroughtRelatively Moderate
- Winter WeatherRelatively Moderate
- Ice StormRelatively Moderate
- EarthquakeRelatively Low
- LandslideVery Low
Source: FEMA National Risk Index (December 2025 release). County-level ratings are relative to other U.S. counties and are not a property-specific assessment.
Slidell FAQ
What county is Slidell in?
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Slidell, Louisiana is located in St. Tammany County.
What is the population of Slidell?
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Slidell has a population of about 28,516, making it the number 14 of the 37 Louisiana cities listed on GIS Map.
What is the elevation of Slidell?
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The elevation of Slidell is approximately 6 feet (2 meters) above sea level at the city center.
What ZIP codes are in Slidell?
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ZIP codes for Slidell include 70458, 70459, 70460, 70461, 70469.
What time zone is Slidell in?
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Slidell is in the Central Time zone (America/Chicago).
How far is Slidell from Baton Rouge?
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Slidell is about 85 miles from Baton Rouge, the capital of Louisiana, in a straight line.
How far is Slidell from New Orleans?
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Slidell is about 28 miles from New Orleans, the largest city in Louisiana listed on GIS Map, in a straight line.
What cities are near Slidell?
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Cities near Slidell include Mandeville, LA (18 miles); Picayune, MS (18 miles); Covington, LA (24 miles); Bay St. Louis, MS (27 miles); New Orleans, LA (28 miles).
Local notes for Slidell, LA
Questions and local knowledge from people who know the area. Every note is read before it appears here.