The occurrence and distribution of green lacewing species (Neuroptera: Chrysopidae) were studied in northwestern Turkey in 1992-2005. A total of 3529 green lacewing adults were collected from 154 localities, representing 23 species. Among these, 21 species belonged to the subfamily Chrysopinae, while only two species were members of the subfamily Nothochrysinae. Four species were new records for northwestern Turkey. The most frequently caught species were Chrysoperla carnea sensu lato and Dichochrysa prasina, with percent dominance values of 26.10 and 18.22%, respectively. The cumulative number of chrysopid species was highest during July with a total of 18 species per month. There were 13, 20, 19 and one chrysopid species occurring at altitudes between 1-500, 501-1000, 1001-1500 and >1500 m species, respectively. Rexa raddai, was recorded at altitudes higher than 500 m, namely 925 m, for the first time. In addition, plant species harboring chrysopids are provided for each species and their association with the chrysopid fauna is discussed.