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

Kansas ZIP Codes

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

State	ZIP Code	City	County	Area Codes
KS	66548	Waterville	Marshall County	`785`
KS	66549	Westmoreland	Pottawatomie County	`785`
KS	66550	Wetmore	Nemaha County	`785`
KS	66552	Whiting	Jackson County	`785`
KS	66554	Randolph	Riley County	`785`
KS	66601	Topeka	Shawnee County	`785`
KS	66603	Topeka	Shawnee County	`785`
KS	66604	Topeka	Shawnee County	`785`
KS	66605	Topeka	Shawnee County	`785`
KS	66606	Topeka	Shawnee County	`785`

Page 21 of 76

Geographic Map of Kansas

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.