Marsh frogs (Rana ridibunda) were collected in Antalya province, southwestern Turkey, during 2001 and 2002 and examined for helminths. Of 258 frogs, 235 (91.1%) were infected with 1 or more helminths. The helminth fauna of R. ridibunda comprised 16 species: 10 species of trematodes (Codonocephalus urnigerus [metacercariae], Diplodiscus subclavatus, Gorgodera cygnoides, Gorgoderina vitelliloba, Pleurogenoides medians, Prosotocus confusus, Brachycoelium salamandrae, Haematoloechus breviansa, Encyclometra colubrimurorum [metacercariae], and Opisthioglyphe ranae), 5 species of nematodes (Rhabdias bufonis, Cosmocerca commutata, Neoxysomatium sp., Eustrongylides sp., and Abbreviata sp. [larvae]), and the acanthocephalan Acanthocephalus ranae. Encyclometra colubrimurorum (metacercariae), B. salamandrae, Neoxysomatium sp, Eustrongylides sp., and larval Abbreviata sp. represent new host records for R. ridibunda in Turkey.