Official USPS Abbreviations

State/Possession Abbreviation
ALABAMA AL
ALASKA AK
AMERICAN SAMOA AS
ARIZONA AZ
ARKANSAS AR
CALIFORNIA CA
COLORADO CO
CONNECTICUT CT
DELAWARE DE
DISTRICT OF COLUMBIA DC
FEDERATED STATES OF MICRONESIA FM
FLORIDA FL
GEORGIA GA
GUAM GU GU
HAWAII HI
IDAHO ID
ILLINOIS IL
INDIANA IN
IOWA IA
KANSAS KS
KENTUCKY KY
LOUISIANA LA
MAINE ME
MARSHALL ISLANDS MH
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
NORTHERN MARIANA ISLANDS MP
OHIO OH
OKLAHOMA OK
OREGON OR
PALAU PW
PENNSYLVANIA PA
PUERTO RICO PR
RHODE ISLAND RI
SOUTH CAROLINA SC
SOUTH DAKOTA SD
TENNESSEE TN
TEXAS TX
UTAH UT
VERMONT VT
VIRGIN ISLANDS VI
VIRGINIA VA
WASHINGTON WA
WEST VIRGINIA WV
WISCONSIN WI
WYOMING WY

Military "State" Abbreviation
Armed Forces Africa AE
Armed Forces Americas
  (except Canada)
AA
Armed Forces Canada AE
Armed Forces Europe AE
Armed Forces Middle East AE
Armed Forces Pacific AP