Leptolejeunea is a genus of liverwort in family Lejeuneaceae.

[2] The genus name of Leptolejeunea is derived from lepton from the Greek λεπτός (meaning "small") and also Lejeunea which is in honour of Alexandre Louis Simon Lejeune (1779–1858), who was a Belgian physician and botanist.

[3] Lejeunea was the original genus of this type of liverworts published in 1820.

World Flora Online lists up to 47 species.

[4] Although, 74 species are accepted by GBIF (as of July 2023):[2]