Hapalomys is a genus of rodent in the family Muridae endemic to Southeast Asia. It is the only member of the tribe Hapalomyini. It contains the following species:

• Delacour's marmoset rat (Hapalomys delacouri)
• Marmoset rat (Hapalomys longicaudatus)
• Suntsov's marmoset rat (Hapalomys suntsovi), a Vietnamese endemic recently described from Binh Phuoc Province, southern Vietnam

†Hapalomys gracilis (fossil species)

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