| ZIP Codes: | 9 ZIP Codes (5 Standard, 2 PO Box, 2 Unique) [See All] |
| Area Code: | 228 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:48 PM |
| Population: | 38,648 [See All] |
| FIPS: | 28045 |
| CBSA: | Gulfport-Biloxi, MS |
| Land Area: | 305 sq mi |
| Water Area: | 8 sq mi |
| Coordinates: | 30.3302, -89.4742 |
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38,648 residents live across 9 ZIPs covering 305 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 39,188 to 38,648 from 2014 to 2024 — a -1.4% change. 2 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 39525 (Diamondhead, $87,407 median) and poorest ZIP 39572 (Pearlington, $44,786) are 15.8 miles apart — a 2.0× income gap across local geography.
Median home values vary 2.6× across this county — from $98,300 in 39572 (Pearlington) to $259,600 in 39525 (Diamondhead).
Density varies 19× across the county — from 52 people/sq mi in 39556 (Kiln) to 964 in 39576 (Waveland).
Educational attainment ranges from 12.2% bachelor's+ in 39572 (Pearlington) to 42.3% in 39525 (Diamondhead) — the breadth of educational profiles across the area.
Within Mississippi, this is the #19 most populous of 82 counties and ranks #8 for median household income .
Hosts 2 single-entity Unique ZIPs: 39522Naval Ocean O Graphic ; and 39529National Space Technology La .
Weighted by population, the typical household earns about $68,782 across the county — reflecting what a typical resident sees, not a simple ZIP average.
29.3% of adults age 25+ hold a bachelor's degree or higher (8,497 of 28,974 reporting).
5 Standard delivery, 2 PO Box only, 2 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 39520 | Bay Saint Louis | Standard | 15,561 | $62,176 | 111.9 | -0.6% |
| 39525 | Diamondhead | Standard | 9,338 | $87,407 | 13.2 | 12.8% |
| 39576 | Waveland | Standard | 6,387 | $70,217 | 6.6 | 7.1% |
| 39556 | Kiln | Standard | 6,041 | $60,739 | 117.1 | -21.9% |
| 39572 | Pearlington | Standard | 1,321 | $44,786 | 21.4 | -15.2% |
| 39529 | Stennis Space Center | Unique | 0 | — | 12.3 | — |
| 39558 | Lakeshore | PO Box | — | — | 0.0 | — |
| 39521 | Bay Saint Louis | PO Box | — | — | 0.0 | — |
| 39522 | Stennis Space Center | Unique | — | — | 22.7 | — |