U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
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State directory

Mississippi ZIP Codes

Complete postal directory, details, and geographic map for the State of Mississippi.

State ZIP Code City County Area Codes
MS 39505 Gulfport Harrison County 228
MS 39506 Gulfport Harrison County 228
MS 39507 Gulfport Harrison County 228
MS 39520 Bay Saint Louis Hancock County 228
MS 39521 Bay Saint Louis Hancock County 228
MS 39522 Stennis Space Center Hancock County 228
MS 39525 Diamondhead Hancock County 228
MS 39529 Stennis Space Center Hancock County 601, 769
MS 39530 Biloxi Harrison County 228
MS 39531 Biloxi Harrison County 228
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Geographic Map of Mississippi

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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.