Troy, OH ZIP Code

ZIP code, county, time zone and coordinates of Troy, Ohio

The ZIP code of Troy, OH is 45373. It is in Miami County.

Mailing address format for Troy

John Smith
123 Main St
TROY OH 45373
USA

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

ZIP code	Population	Area
45373	—	87.7 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 Troy, OH?

The main ZIP code for Troy, OH is 45373.

How many ZIP codes does Troy have?

Troy has 1 ZIP code.

What county is Troy, OH in?

Troy is in Miami County, Ohio.

What time zone is Troy in?

Troy is in the America/New York time zone (EST, UTC-05:00 right now).

What are the coordinates of Troy?

Latitude 40.04460, longitude -84.22410.

Last updated: November 14, 2026