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

Maps and coordinates

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	64638	Dawn	Livingston County	`660`
MO	64639	De Witt	Carroll County	`660`
MO	64640	Gallatin	Daviess County	`660`
MO	64641	Galt	Grundy County	`660`
MO	64642	Gilman City	Harrison County	`660`
MO	64643	Hale	Carroll County	`660`
MO	64644	Hamilton	Caldwell County	`660, 816`
MO	64645	Harris	Sullivan County	`660`
MO	64646	Humphreys	Sullivan County	`660`
MO	64647	Jameson	Daviess County	`660`

Page 67 of 118

Geographic Map of Missouri

Postal context

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.