Astronidium is a genus of plants in family Melastomataceae. It contains the following species (but this list may be incomplete):

• Astronidium degeneri, A.C. Smith
• Astronidium floribundum, (Gillespie) A.C. Smith
• Astronidium fraternum, (A.Gray) J.Maxwell
• Astronidium glabrum, (J.G.Forster) Markgraf
• Astronidium inflatum, (A.C.Sm.) A.C. Smith
• Astronidium kasiense, A.C. Smith
• Astronidium lepidotum, A.C. Smith
• Astronidium ligulatum, (J.Moore) J.Maxwell
• Astronidium macranthum, (A.C. Sm.) A.C. Smith
• Astronidium ovalifolium, (Decne. ex Triana) J.Maxwell
• Astronidium pallidiflorum, A.C. Smith
• Astronidium robustum, (Seem.) A.C. Smith
• Astronidium saccatum, (J.Moore) J.Maxwell
• Astronidium saulae, A.C. Smith
• Astronidium storckii, Seem.
• Astronidium tomentosum, (Seem.) A.C. Smith
• Astronidium victoriae, (Gillespie) A.C. Smith