Is it legal for a US citizen marry person from Jamaica in the US?

Yes, it is legal for a US citizen to marry a person from Jamaica in the United States. As long as both parties meet the legal requirements for marriage in the United States, such as being of legal age and not already legally married to someone else, they can get married regardless of their nationality or citizenship. The specific requirements for marriage may vary from state to state, so it's important to check the laws in the state where the marriage will take place.