Daniel Robert "Bob" Graham (born November 9, 1936) is an American politician. He was the governor of Florida from 1979 to 1987 and a United States Senator from that state from 1987 to 2005. Following a failed bid for the Democratic Party nomination in the 2004 presidential race, Graham was considered a possible running mate for John Kerry.

Graham dropped out of the race for the Democratic presidential nomination on October 6, 2003 and announced his retirement from the Senate on November 3, 2003.

Graham is now concentrating his efforts on the newly established Bob Graham Center for Public Service at his undergraduate alma mater, the University of Florida. He also serves as Chairman of the Commission on the Prevention of WMD proliferation and terrorism and advocates for the recommendations in the Commission report, World at Risk.