Invasive alien plants are non-native plants that have come to a new habitat and permanently survive there because of their strong propagation ability and the potential for spreading to large areas. This is negatively affecting biodiversity, human health and etc. There are 74 invasive taxa recorded on the Croatian territory, of which at least a small amount appears in the coastal area. However, exclusively in the coastal area appears 12 species: Aster squamatus, Bidens subalternans, Conyza sumatrensis, Diplotaxis erucoides, Euphorbia prostrata, Nicotiana glauca, Opuntia ficus-indica, Oxalis pes-caprae, Paspalum dilatatum, P. paspalodes, Solanum elaeagnifolium, Tagetes minuta. This paper presents basic data on their structure, habitats, effects, origin and control possibilities.20 Invasive alien plants are very successful in the coastal area due to favorable ecological factors and developed traffic and tourism. Most of them have been introduced from South America or from other areas with a similar mediterranean climate. For most species, successful removal methods have not been found yet (at least mechanical removal is always recommended). Therefore, the problem should be tackled from preventive actions which include the improvement of legislation, stricter control measures at borders and citizen education.