The aim of the present study, for which collections were made in 2004, 2005 and 2008, was to document the species of Geometridae in the Ayder plateau of the eastern Black Sea region of Turkey. A total of 31 species belonging to 23 genera of the Geometridae family were identified. All identified species are first records for the Ayder Platau, while three (Xanthorhoe spadicearia (Denis & Schiffermüller, 1775), Dysstroma citrata (Linnaeus, 1761) and Eupithecia egenaria Herrich & Schäffer, 1848) are first records for the Turkish Geometridae fauna. Idaea muricata (Hufnagel, 1767), which was collected in Samsun, is a new record for Asian Turkey (Anatolia). A zoogeographic characterisation is proposed for each species.