US States Reference

Reference of US states with abbreviations, capitals and population data.

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Good to know

50 states + D.C.The United States has 50 states and one federal district, Washington, D.C., which is not a state. The last two states to join were Alaska (1959) and Hawaii (1959).

Capitals are not the biggest cityPeople often confuse New York City with New York's capital (Albany), or LA with California's (Sacramento). Most U.S. capitals are smaller, historic seats of government.

Five territoriesPuerto Rico, Guam, the Northern Mariana Islands, American Samoa and the U.S. Virgin Islands are permanently inhabited U.S. territories. Their residents are U.S. citizens except in American Samoa.

Postal abbreviationsThe two-letter codes (TX, CA, NY) are USPS abbreviations used on mail, license plates and forms. Note that some differ from older traditional codes.

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Tool Introduction

This reference lists all 50 U.S. states plus Washington, D.C. and the five major inhabited territories, each with its capital, two-letter postal abbreviation and the date it joined the Union (or became a U.S. territory).

Search by state name, capital or abbreviation, filter by type, and click any row to pin the details on the right. Use the copy button to grab a ready-to-paste line such as "California (CA) — Sacramento".