Famous Irish American Politicians of both today and throughout history. This list of notable Americans of Irish descent includes pictures (Famous Irish people take great photos). All of the most important Irish Americans I could find who entered public service are listed, and in many cases additional data is included, though compiling every well known Irish American who went into politics would be a pretty difficult task. Irish immigrants are part of the fabric that is the great American melting pot. Important Irish politicians in the US include many distinguished Senators, and Congressmen, including a President, JFK.