Leptochidium is a genus of lichen-forming fungi in the family Massalongiaceae. It has two species:

• Leptochidium albociliatum (Desm.) M.Choisy (1952)
• Leptochidium crenatulum (Nyl.) P.M.Jørg. (2006)

The genus was circumscribed by French lichenologist Maurice Choisy in 1952. Leptochidium remained monotypic until 2006, when Per Magnus Jørgensen transferred into it a species originally named Leptogium rivulare var. crenatulum by William Nylander.

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