Beamys is a genus of rodent in the family Nesomyidae. It contains the following species:

• Lesser hamster-rat (Beamys hindei)
• Greater hamster-rat (Beamys major)

• Musser, G. G.; Carleton, M. D. (2005). "Superfamily Muroidea". In Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. pp. 894–1531. ISBN 978-0-8018-8221-0. OCLC 62265494.