Legality of Bestiality in America

Many U.S. states explicitly outlaw sex with animals (sometimes under the term of "sodomy" or "unnatural crime against nature"). Others do not.

Many U.S. state laws against sodomy were repealed or struck down by the courts in Lawrence v. Texas, which ruled that perceived moral disapproval on its own was an insufficient justification for banning a private act. On the other hand, the 2004 conviction of a man in Florida (State vs. Mitchell) demonstrated that even in states with no specific laws against zoophilia acts, animal cruelty statutes would instead be applied. Similarly, in 2011 a Shelby, Ohio zoophile who regularly had sex with his dogs was arrested and charged with animal cruelty, even though there are no laws specifically prohibiting bestiality in Ohio. An incident similar to the Shelby incident occurred in Metairie, Louisiana in 2012.

Bestiality is officially illegal in 37 states. Zoosexual activity is a misdemeanor in the following 20 states:
Alaska
Arkansas
California
Colorado
Connecticut
Florida
Iowa
Kansas
Louisiana
Maryland
Maine
Minnesota
Missouri
Nebraska
New York
North Dakota
Oregon
Pennsylvania
Utah
Wisconsin

Bestiality is a felony in the following 17 states:

Arizona
Delaware
Georgia
Idaho
Illinois
Indiana
Massachusetts
Michigan
Mississippi
North Carolina
Oklahoma
Rhode Island
South Carolina
South Dakota
Tennessee
Virginia
Washington

Source: http://en.wikipedia.org/wiki/Zoophilia_and_the_law