In order to conduct the classification and characteristic of vegetation for coastal sand dunes in Korea, The Current situation and vegetation at 33 areas were evaluated. In this study, 203 species in 51 families of vegetation were appeared. Among them, 47 species in 19 families were sand dune vegetation and 36 species in 14 families were naturalized plant species. Orobanche coerulescens and Glwhnia littoralis are assigned as a rare species by the Korea Forest Service. Species that differentiate the areas included Calemagrostis epigeios, Ischaemum anthephoroides, Linaria japonica, and Elymus mollis. Total of 59 (32 on the East coast, 40 on the West coast, and 18 on the South coast) coastal plant communities were evaluated. Seasonal variations in sand dune vegetation were categorized into three groups. Spring includes Lathyrus japonica and Calystegia soldanella communities. Summer includes Elymus mollis, Zoysia macrostachya, Vitex rotundifolia, Carex kobomugi, Ixeris repens, Carex pumila, and Rosa rugosa. Fall includes Ischaemum anthephoroides communities. The results of CCA which estimates the distribution pattern of sand dune plant community in regard to soil environment of habitat showed three groups