Rathmann is a surname. Notable people with the surname include:
Dick Rathmann (1924–2000), American racecar driver George Rathmann (1927–2012), American chemist, biologist, pioneer in biotechnology and corporate executive Jim Rathmann (1928–2011), born Royal Richard Rathmann, American racecar driver who won the Indianapolis 500 in 1960 Oswald Rathmann (born 1891), German road racing cyclist who competed in the 1912 Summer Olympics Peggy Rathmann (born 1953), American illustrator and writer of children's picture books
See also Rahman (disambiguation) Rathausmann Ratman