Charles F. Dowd (1825–1904) was an American educator who was co-principal (with his wife Harriet M. Dowd) of the Temple Grove Ladies Seminary (now Skidmore College) in Saratoga Springs, New York. He was the first person to propose multiple time zones for any country, those for the railways of the United States. He did not propose their extension to the entire world, which was suggested by the Italian mathematician Quirico Filopanti, and championed by the Canadian engineer Sandford Fleming.