In the present study, the rare species of the city Samsun which distributed in sand dune ecosystem were investigated.The study was carried out in the localities Çobanyatağı (Terme), Sindel, Hürriyet and Costal (Çarşamba), Cernek, Sahilkent(Bafra) and Doyran (Alaçam) of Samsun sand dune. Sand dune communities were sampled from April 2010 to July 2012 byusing minimal area method in 16 m2plots. The coastal sand dunes of Çobanyatağı, Sindel, Cernek, Sahilkent (Bafra) andDoyran (Alaçam) is consist of upper beach/driftline, primary/embryonic, main, transitional and, fixed dune zones ) while thefixed zone is totally disappeared and transitional zone is significantly interrupted in the localities Costal and Hürriyet especiallydue to the building settlement. Rare species on each coastal dune zones in all localities were determined according to the rarityindex formula. As a result, each locality was assessed independently, and it is indicated that the rarity index of 47 species is low.