It is found in southwestern Cameroon and in Equatorial Guinea, including the island of Bioko.

[2] It is named for Ivan T. Sanderson, a British naturalist and explorer, and later on, author and television commentator.

[3][4] Phrynobatrachus sandersoni live in the vicinity of streams in forest.

[1] Phrynobatrachus sandersoni are small frogs: adults measure 21–26 mm (0.83–1.02 in) in snout–vent length.

Breeding males exhibit nuptial pads, lateral vocal folds, femoral glands and enlarged pseudo-teeth in the lower jaw.