2-Letter State Abbreviations
The United States Postal Service publishes this list of official 2-letter abbreviations for the 50 US states. The abbreviations are to be used when addressing mail. The two letters of each abbreviation are always capitalized and without periods. So, for example, the abbreviation for New York is NY and not N.Y. or Ny. And the abbreviation for Texas is TX and not T.X. or Tx.
Alabama - AL
Alaska - AK
Arizona - AZ
Arkansas - AR
California - CA
Colorado - CO
Connecticut - CT
Delaware - DE
Florida - FL
Georgia - GA
Hawaii - HI
Idaho - ID
Illinois - IL
Indiana - IN
Iowa - IA
Kansas - KS
Kentucky - KY
Louisiana - LA
Maine - ME
Maryland - MD
Massachusetts - MA
Michigan - MI
Minnesota - MN
Mississippi - MS
Missouri - MO
Montana - MT
Nebraska - NE
Nevada - NV
New Hampshire - NH
New Jersey - NJ
New Mexico - NM
New York - NY
North Carolina - NC
North Dakota - ND
Ohio - OH
Oklahoma - OK
Oregon - OR
Pennsylvania - PA
Rhode Island - RI
South Carolina - SC
South Dakota - SD
Tennessee - TN
Texas - TX
Utah - UT
Vermont - VT
Virginia - VA
Washington - WA
West Virginia - WV
Wisconsin - WI
Wyoming - WY