Alabama
Alaska
California
Colorado
Connecticut
District of Columbia
Florida
Georgia
Hawaii
Maryland
Massachusetts
New Jersey
New Mexico
New York
North Carolina*
Rhode Island
South Carolina
Tennessee
Vermont
Virginia
First cousin marriage is allowed in these states under the following circumstances:
Arizona- if both are 65 or older, or one is unable to reproduce.
Illinois- if both are 50 or older, or one is unable to reproduce.
Indiana- if both are at least 65.
Maine- if couple obtains a physician's certificate of genetic counseling.
Utah- if both are 65 or older, or if both are 55 or older and one is unable to reproduce.
Wisconsin- if the woman is 55 or older, or one is unable to reproduce.
And of course you'll need to be 18 OR HAVE PARENTAL PERMISSION...