Ronnie Rancifer (born 1952) is an American keyboardist, musician and songwriter, noted for being a keyboardist for The Jackson 5 from their early Gary, Indiana days until the end of their famed career at Motown. The label presented Rancifer and drummer Johnny Jackson as the cousins^[1] of Jackie, Tito, Jermaine, Marlon, Michael, however neither Rancifer nor Johnny Jackson are actually related to the Jacksons.

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He co-wrote "I Am Love" from the 1974 Jackson 5 album Dancing Machine. In addition to playing keys for the Jackson 5, Rancifer worked as a songwriter on some of their albums and was with the group until 1975. Rancifer had a long career as a songwriter in Los Angeles.

During the 1980s he worked with other Motown artists, and toured with Smokey Robinson.