Columbus, Ohio, was the location of an interesting topfree story in the news a few years ago. In 1995 five women who went topless in the Columbus Gay Pride parade were arrested and later released. The charges were later dropped. According to Ohio Law, breasts are not considered "private parts", so in Ohio if a woman is topless in public, it is not considered indecent exposure. In fact, three of the women who had been arrested in the Columbus Pride parade, later sued the city of Columbus for false arrest and won their case. They were paid $15,000 in total for damages. Since then, the Columbus police force has been educated not to arrest top free women. Unfortunately, not all cities in Ohio seem to honor this statute, so the police in some cities might ask topless women to cover up – supposedly on the grounds that they are "causing a public disturbance." So long as women comply with any such police request, they supposedly should not be in danger of any legal action.
http://www.examiner.com/x-17712-Cleveland-Open-Relationships-Examiner~y2009m8d22-National-go-topless-protest-day