What Is the Abbreviation for Connecticut?
The standard abbreviation for Connecticut is CT. This page explains why Connecticut uses CT, how the code fits into the modern USPS system, what older printed abbreviations looked like, and which nearby or similar state codes people commonly confuse with it.
What Is the Abbreviation for Connecticut?
CT is the standard abbreviation for Connecticut. Conn. still appears in older print sources, but CT is the standard code used in addresses, forms, databases, and current style guides.
Use CT for Connecticut in mailing addresses, shipping labels, and official or business records.
Why Connecticut Uses CT
Connecticut's USPS abbreviation is CT.
CT became Connecticut's standard postal abbreviation in 1963. Conn. still appears in older writing, but CT is the form used in current addresses, forms, and databases.
Old Abbreviation for Connecticut
Before the USPS two-letter system became the mailing standard in 1963, printed reference books and newspapers often used longer abbreviations with punctuation. For Connecticut, that older style was usually Conn..
That older form still appears in historical texts, archival material, and some legacy style guides, but the modern postal and database standard is CT. If someone searches for old abbreviation for Connecticut, the practical answer is to recognize Conn. and use CT in current writing and addresses.
How to Write Connecticut in an Address
In standard American addressing, the state line uses the city name followed by the two-letter code and ZIP Code. The abbreviation stays uppercase and does not take periods.
That same format applies in checkout forms, school worksheets, CRM exports, spreadsheets, shipping labels, and government databases — anywhere a two-letter state code is required.
CT Compared With Similar State Codes
CT is usually just a quick confirmation, since the postal code is much shorter and cleaner than the full state name.
Related Abbreviation Questions
These states share a first letter, region, or alphabetical position with Connecticut and are commonly checked alongside it.
Capital, Region, and Context
Connecticut belongs to the Northeast region. Its capital is Hartford, and its postal code CT is used in addresses, forms, and databases throughout the country.
Connecticut entered the Union on January 9, 1788.
FAQ
What is the abbreviation for Connecticut?
The standard USPS abbreviation for Connecticut is CT.
What is the postal abbreviation for Connecticut?
CT is the two-letter postal abbreviation for Connecticut. It is the form used in mailing addresses, shipping labels, forms, and databases.
How do you abbreviate Connecticut?
Abbreviate Connecticut as CT in current USPS, mailing, and database use.
Why is Connecticut abbreviated CT?
Connecticut's USPS abbreviation is CT.
What does CT stand for?
CT stands for Connecticut in the USPS state abbreviation system.
What is the old abbreviation for Connecticut?
Older editorial styles often wrote Connecticut as Conn.. For mailing and database use, the modern standard is CT.
How do you write a Connecticut mailing address?
Use the city name, then the two-letter postal code CT, then the ZIP Code. For example: Hartford, CT 00000.
What state is CT?
CT is the postal abbreviation for Connecticut, located in the Northeast region. The capital is Hartford.
Test All 50 State Abbreviations
Now that you know CT stands for Connecticut, see how many of the other 49 you can get right. The M-states and I-states trip up most people.