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

Missouri ZIP Codes

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

State ZIP Code City County Area Codes
MO 63041 Grubville Franklin County 573, 636
MO 63042 Hazelwood St. Louis County 314, 557
MO 63043 Maryland Heights St. Louis County 314, 557
MO 63044 Bridgeton St. Louis County 314, 557, 636
MO 63045 Earth City St. Louis County 314, 557
MO 63047 Hematite Jefferson County 636
MO 63048 Herculaneum Jefferson County 618, 636
MO 63049 High Ridge Jefferson County 636
MO 63050 Hillsboro Jefferson County 636
MO 63051 House Springs Jefferson County 636
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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.