Chiromantis petersii is a species of frog in the family Rhacophoridae. It is found in Kenya and Tanzania and is broadly distributed in the inland areas of both countries. Chiromantis kelleri was previously considered subspecies of Chiromantis petersii, but is currently recognized as a distinct species. These two species are sympatric in northern Kenya.
The specific name petersii honours Wilhelm Peters, German zoologist and traveller. Common names Peters' foam-nest treefrog, Peters' foam-nest frog, and central foam-nest tree frog have been proposed for it.
Males grow to a snout–vent length of 45mm and females to 65mm. The dorsum is rough and has usually grey and brown colouration, sometimes with darker markings. The throat is pale and may have black speckles. The fingers and the toes are partially webbed and bear small terminal discs. The male advertisement call is a series of quiet creaks.
Chiromantis petersii occurs in dry savanna woodland, generally in areas receiving less than 800 mm rain per year. It also occurs in agricultural and suburban situations. Breeding takes place in temporary pools and involves foam nests. It is a widespread and reasonably common species. It is probably not experiencing significant threats, although it might locally be impacted by overgrazing. It is sometimes present in the international pet trade. It occurs in a number of protected areas.