Ralf, Rafe or Ralph Martin may refer to:

Sportsmen

• William Ralph Martin Leake (1865–1942), English rugby union forward
• Ralph Martin Huff (born 1948), American football linebacker
• Ralph Martin Treuel (born 1955), American baseball coach
• Ralf Martin (born 1967), German racing driver

Writers

• Ralph G. Martin (1920–2013), American political biographer
• Ralph P. Martin (1925–2013), English academic and New Testament scholar
• David Ralph Martin (1935–2007), English television and film writer
• Rafe Martin (born 1946), American writer of children's literature for North Atlantic Books
• Ralph C. Martin (born 1942), American Catholic academic and writer since 1960s
• Ralph Martin, American journalist and founder in 1997 of CNHI publications

Others

• Ralph P. Martin (before 1950—2017), American actor in 1998 film The Dentist 2
• Ralph Martin Publicover (born 1952), British diplomat (List of ambassadors of the United Kingdom to Angola)
• Ralph Martin, Western Australian Government Astronomer from 2010 to 2013
• Ralph Martin, American banjoist (American Banjo Museum Hall of Fame members in 2003)

Characters

• Ralph Martin, character in 1933 American film Stage Mother