Is it legal to eat wild oysters?

Different areas have different rules. You can check with your local natural resource agency. You should also remember that being legal is not the same as advisable. Oysters and other bottom feeders can collect toxins from pollution, so I wouldn't eat oysters from an area near a sewage treatment plant. I have, however, eaten oysters, mussels, and clams that I collected in areas of the eastern U.S.