Yes check out your own state and states you travel in for sure. Some it is a crime, for instance Oklahoma. Others it is not unless you refuse to leave, like Missouri. To find out you have to actually pull up the state statutes themselves and see what if any is the penalty or punishment for carrying concealed into the list of places they say not to conceal in. I would definitely not do this in government buildings, courthouses, police stations, etc, no matter what.