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What state is CO?

CO = Colorado

CO is the official two-letter USPS postal abbreviation for Colorado. The capital is Denver, and Colorado is in the West region. See the full Colorado profile for borders, nickname, symbols, and map practice.

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Quick facts

Abbreviation
CO
Capital
Denver
Region
West
Nickname
The Centennial State

Easy to confuse with

CT = Connecticut
Not CO
CA = California
Not CO

FAQ

What state is CO?

CO is Colorado.

Is CO Colorado?

Yes. CO is the USPS postal abbreviation for Colorado.

What is the capital of Colorado?

The capital of Colorado is Denver.

Which states are easy to confuse with CO?

Watch for codes like CT, CA when you see CO.