The following new species of Cyclocephala Dejean, 1821 (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) are described from Peru: C. mateoi Paz Ratcliffe, C. ukuku Paz Ratcliffe, and C. hylaea Ratcliffe Paz. A description, diagnosis, geographic distribution, notes on natural history, and illustrations are provided for each new species. Six Cyclocephala species are reported for the first time from Peru: C. emarginata Endrdi, 1964, C. guianae Endrdi, 1969, C. kuntzeniana Hhne, 1923, C. malyi Dupuis, 2014, C. ovulum Bates, 1888, and C. sylviae Dechambre, 1995. An updated, annotated list of the 81 Peruvian species of Cyclocephala is provided.
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