What Is the Abbreviation for Ohio?
The standard 2-letter abbreviation for Ohio is OH.
Ohio Abbreviation
OH is the standard abbreviation for Ohio. OH is the form used in mailing addresses, forms, databases, and current style guides.
Ohio Abbreviation for Mailing and Forms
Use OH for Ohio in mailing addresses, shipping labels, official forms, and database records.
In all of these contexts write OH in uppercase. The form OH. with a period is incorrect for postal use.
What Does OH Stand For?
Ohio's USPS abbreviation is OH.
OH has been Ohio's standard postal abbreviation since 1963 and is the form used in current addresses, forms, and databases.
How to Write an Ohio Address
In a U.S. mailing address, write the city name, then OH in uppercase, then the five-digit ZIP Code. Never put a period after the abbreviation.
The same format applies in checkout forms, school worksheets, CRM systems, spreadsheets, shipping labels, and government databases — anywhere a two-letter state code is required.
Related Abbreviation Questions
These states share a first letter, region, or alphabetical position with Ohio and are commonly looked up alongside it.
FAQ
What is the abbreviation for Ohio?
The standard USPS abbreviation for Ohio is OH.
What is the postal abbreviation for Ohio?
OH is the two-letter postal abbreviation for Ohio. It is the form used in mailing addresses, shipping labels, forms, and databases.
How do you abbreviate Ohio?
Abbreviate Ohio as OH in current USPS, mailing, and database use.
What is the two-letter abbreviation for Ohio?
OH is the official two-letter abbreviation for Ohio.
What is the Ohio state code?
OH is the two-letter state code used for Ohio in mailing addresses, forms, spreadsheets, and databases.
Why is Ohio abbreviated OH?
Ohio's USPS abbreviation is OH.
What does OH stand for?
OH stands for Ohio in the USPS state abbreviation system.
What is the old abbreviation for Ohio?
Older editorial styles often wrote Ohio as Ohio. For mailing and database use, the modern standard is OH.
How do you write an Ohio mailing address?
Use the city name, then the two-letter postal code OH, then the ZIP Code. For example: Columbus, OH 00000.
What state is OH?
OH is the postal abbreviation for Ohio, located in the Midwest region. The capital is Columbus.