Jaan Rannap (September 3, 1931 – November 1, 2023) was an Estonian children's writer and track-and-field athlete.

His father was a teacher Jaan Rannap, his brother is a music teacher and pedagogical scientist Heino Rannap and his nephew is musician Rein Rannap.

In 1956 he graduated from Tallinn Pedagogical Institute with a degree in mathematics and physics. From 1952 he worked at the children's magazine Säde, and 1955-1977 at the magazine Pioneer. From 1977 he was a senior editor of the children's magazine Täheke.