Platymantis bayani is a species of frog in the family Ceratobatrachidae. It is endemic to the island of Samar, the Philippines. It is only known from its type locality, the Taft Forest Reserve in Taft, Eastern Samar. The specific name bayani is derived from the Tagalog word meaning "highly respected", "heroic", or "hero". The name honors Walter C. Brown, in recognition of his "numerous contributions to Philippine herpetology and … lifelong commitment to the study of biodiversity in the SW Pacific." Accordingly, common name Walter's limestone forest frog has been proposed for this species.

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