What Is the Abbreviation for Oklahoma?
The standard 2-letter abbreviation for Oklahoma is OK.
Oklahoma Abbreviation
Oklahoma's abbreviation is OK. You may also see Okla. in older writing, but OK is the form used in mailing addresses, forms, databases, and current style guides.
Oklahoma Abbreviation for Mailing and Forms
Use OK for Oklahoma in mailing addresses, shipping labels, official forms, and database records.
In all of these contexts write OK in uppercase. The form OK. with a period is incorrect for postal use.
AP Style and Traditional Oklahoma Abbreviation
What Does OK Stand For?
Oklahoma's USPS abbreviation is OK.
USPS adopted OK for Oklahoma in 1963. The older form Okla. still appears in older publications, but OK is the standard postal abbreviation today.
How to Write an Oklahoma Address
In a U.S. mailing address, write the city name, then OK 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 Oklahoma and are commonly looked up alongside it.
FAQ
What is the abbreviation for Oklahoma?
The standard USPS abbreviation for Oklahoma is OK.
What is the postal abbreviation for Oklahoma?
OK is the two-letter postal abbreviation for Oklahoma. It is the form used in mailing addresses, shipping labels, forms, and databases.
How do you abbreviate Oklahoma?
Abbreviate Oklahoma as OK in current USPS, mailing, and database use.
What is the two-letter abbreviation for Oklahoma?
OK is the official two-letter abbreviation for Oklahoma.
What is the Oklahoma state code?
OK is the two-letter state code used for Oklahoma in mailing addresses, forms, spreadsheets, and databases.
Why is Oklahoma abbreviated OK?
Oklahoma's USPS abbreviation is OK.
What does OK stand for?
OK stands for Oklahoma in the USPS state abbreviation system.
What is the old abbreviation for Oklahoma?
Older editorial styles often wrote Oklahoma as Okla.. For mailing and database use, the modern standard is OK.
How do you write an Oklahoma mailing address?
Use the city name, then the two-letter postal code OK, then the ZIP Code. For example: Oklahoma City, OK 00000.
What state is OK?
OK is the postal abbreviation for Oklahoma, located in the South region. The capital is Oklahoma City.