Vassar, KS ZIP Code

ZIP code, county, time zone and coordinates of Vassar, Kansas

The ZIP code of Vassar, KS is 66543. It is in Osage County.

Mailing address format for Vassar

John Smith
123 Main St
VASSAR KS 66543
USA

USPS prefers capital letters without punctuation. Check the exact ZIP+4 for a street address on the USPS website.

ZIP code	Population	Area
66543	—	8.9 sq mi	Main

ZIP Code Tabulation Areas (ZCTA), U.S. Census Bureau. A ZCTA can cover parts of more than one town.

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What is the ZIP code for Vassar, KS?

The main ZIP code for Vassar, KS is 66543.

How many ZIP codes does Vassar have?

Vassar has 1 ZIP code.

What county is Vassar, KS in?

Vassar is in Osage County, Kansas.

What time zone is Vassar in?

Vassar is in the America/Chicago time zone (CST, UTC-06:00 right now).

What are the coordinates of Vassar?

Latitude 38.64865, longitude -95.60982.

Last updated: November 14, 2026