| ZIP Codes: | 20 ZIP Codes (13 Standard, 7 PO Box, 0 Unique) [See All] |
| Area Codes: | 504 / 985 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:26 PM |
| Population: | 272,334 [See All] |
| FIPS: | 22103 |
| CBSA: | Slidell-Mandeville-Covington, LA |
| Land Area: | 899 sq mi |
| Water Area: | 34 sq mi |
| Coordinates: | 30.4421, -89.9557 |
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272,334 residents live across 20 ZIPs covering 899 sq mi, served by 12 distinct USPS-recognized cities.
Population moved from 240,476 to 272,191 from 2014 to 2024 — a +13.2% change. 9 ZIPs gained residents, 6 lost.
The parish's wealthiest ZIP 70447 (Madisonville, $122,574 median) and poorest ZIP 70437 (Folsom, $61,280) are 14.0 miles apart — a 2.0× income gap across local geography.
Median home values vary 2.0× across this parish — from $192,800 in 70460 (Slidell) to $394,300 in 70471 (Mandeville).
Density varies 23× across the parish — from 69 people/sq mi in 70431 (Bush) to 1,575 in 70458 (Slidell).
Educational attainment ranges from 19.7% bachelor's+ in 70460 (Slidell) to 56.6% in 70447 (Madisonville) — the breadth of educational profiles across the area.
Within Louisiana, this is the #4 most populous of 64 parishes and ranks #5 for median household income with the #4 fastest decade growth .
Weighted by population, the typical household earns about $83,099 across the parish — reflecting what a typical resident sees, not a simple ZIP average.
37.7% of adults age 25+ hold a bachelor's degree or higher (70,633 of 187,355 reporting). The most-educated ZIPs cluster around Mandeville.
13 Standard delivery, 7 PO Box only, 0 single-entity Unique ZIPs serve this parish.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 70433 | Covington | Standard | 41,876 | $81,241 | 48.9 | 28.1% |
| 70458 | Slidell | Standard | 39,034 | $72,843 | 24.8 | 8.2% |
| 70461 | Slidell | Standard | 34,808 | $89,003 | 107.9 | 21.1% |
| 70448 | Mandeville | Standard | 26,338 | $95,682 | 33.1 | 3.7% |
| 70471 | Mandeville | Standard | 24,199 | $96,501 | 25.9 | 12.4% |
| 70435 | Covington | Standard | 22,475 | $80,926 | 111.7 | 22.0% |
| 70460 | Slidell | Standard | 21,669 | $62,565 | 45.7 | -2.2% |
| 70447 | Madisonville | Standard | 17,897 | $122,574 | 41.4 | 62.1% |
| 70452 | Pearl River | Standard | 12,650 | $62,917 | 126.4 | 8.5% |
| 70445 | Lacombe | Standard | 9,288 | $78,394 | 106.9 | -10.5% |
| 70437 | Folsom | Standard | 8,030 | $61,280 | 84.0 | -4.6% |
| 70420 | Abita Springs | Standard | 7,950 | $78,171 | 56.5 | -5.4% |
| 70431 | Bush | Standard | 5,769 | $69,813 | 83.3 | 24.5% |
| 70457 | Saint Benedict | PO Box | 143 | — | 0.0 | — |
| 70464 | Talisheek | PO Box | 109 | — | 2.9 | -84.8% |
| 70463 | Sun | PO Box | 99 | $25,625 | 0.2 | -56.4% |
| 70434 | Covington | PO Box | — | — | 0.0 | — |
| 70470 | Mandeville | PO Box | — | — | 0.0 | — |
| 70459 | Slidell | PO Box | — | — | 0.0 | — |
| 70469 | Slidell | PO Box | — | — | 0.0 | — |