Koopman's rat (Rattus koopmani) is a species of rodent in the family Muridae. It is found only on Peleng island, located in the Banggai Islands (Kepulauan Banggai) off the southeastern coast of Sulawesi, Indonesia.

• 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. p. 1471. ISBN 978-0-8018-8221-0. OCLC 62265494.