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Slidell, Louisiana

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Located in: Saint Tammany Parish (see below)

Time Zone: Slidell lies in the Central Time Zone (CST/CDT)

Telephone Area Code: (985)

ZIP Codes: 70458-70461, 70469<1>

Elevation: Near sea level<2>

From the 2010 US Census     (For more detail, see our Census Page for Slidell)


2018:<3>     27,711   (2.38% increase since 2010)  
2010:     27,068   (5.34% increase since 2000)
2000:     25,695

Total Area:<4>   15.21 sq. miles [39.4 km²]   - of which 2.39% is water (0.36 sq. miles [0.9 km²])

Housing Units:<5>   11,155

Websites for Slidell

Official Website:
Chamber of Commerce:

GPS Coordinates (Latitude/Longitude)<6>

For the purpose of mapping and calculating distances, we have chosen a reference point within Slidell. The point that we are using is located at these GPS coordinates - Latitude: 30.2881, Longitude: -89.7829     [Map].   In this case, the coordinates for Slidell have been provided by the Geographic Names Information System (GNIS).

DMS - Degrees, Minutes, Seconds

Lat:   30° 17' 17"
Lon:   -89° 46' 58"

Name of USGS Topo Map:<7>   Slidell

Federal GNIS/FIPS Codes for Slidell

GNIS ID:   2405470
FIPS State / Place Code:   22 / 70805

(For more about Federal Codes, see our Misc Page for Slidell)

About Saint Tammany Parish

The city of Covington is the Parish Seat for Saint Tammany Parish.

From the 2010 US Census     (For more detail, see our Census Page for Saint Tammany)


2018:     258,111   (10.43% increase since 2010)  
2010:     233,740   (22.21% increase since 2000)
2000:     191,268

Total Area:   1,124 sq. miles [2,911.6 km²]   - of which 24.79% is water (278.6 sq. miles [721.7 km²])

Housing Units:   95,412

Official Website:

Federal GNIS/FIPS Codes for Saint Tammany

GNIS ID:   1629503
FIPS State / County Code:   22 / 103

(For more about Federal Codes, see our Misc Page for Slidell)

About Louisiana

From the US Census


2018:     4,659,978   (2.79% increase since 2010)  
2010:     4,533,372   (1.44% increase since 2000)
2000:     4,468,976

Websites for State of Louisiana

Official Website:

Federal GNIS/FIPS Codes for State of Louisiana

GNIS ID:   1629543
FIPS State:   22

(For more about Federal Codes, see our Misc Page for Slidell)

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About Saint Tammany Parish

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The official website for Slidell:

The official website for Saint Tammany Parish:

The official website for State of Louisiana:

Footnotes ...

<1>ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a city (such as Slidell). When looking for a ZIP Code, whether Slidell or elsewhere, it's always best to check the website of the United States Postal Service (USPS).

Our list of ZIP Codes for Slidell includes: 70458, 70459, 70460 & 70461.

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<2>The elevation is an estimate for the area around Slidell - it will be higher in some places and lower in others.

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<3>Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2018.

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<4>The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Slidell. The value given by the Census Bureau reflects their statistical (or sampling) requirements. For example, if there is a cluster of people living just outside of the community's official boundary, the Census-defined area might be expanded to include that group.

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<5>A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).

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<6>The longitude & latitude values may not be the geographic center of Slidell, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source.

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<7>The USGS 7.5 Minute topographic map which includes Slidell.

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This page was last modified: 01 Aug 2019
By John Hall