Is adultery a crime?

Yes. There are different Levels which may be placed on the person who commited it so it can mean from a mere fine to years in jail.

Only a handful of states still have a criminal adultery statute and most of them have ceased to prosecute individuals who commit adultery due to the high costs of such proceedings and the difficulty in actually proving that sexual intercourse took place and Many other States have abolished the criminal statute altogether..Adultery remains a civil offense in all 50 states..