The Trichoptera diversity of Vanuatu is reviewed based on earlier and recently collected material. Altogether, 20 species in 12 genera and 8 families are now recognized for the country, of which 12 species are described as new to science in the families Hydrobiosidae (1 species), Hydroptilidae (5 species), Philopotamidae (3 species) and Leptoceridae (3 species). The previously known species from Vanuatu are re-described with illustrations and photographs. A key to adults of the Trichoptera fauna of Vanuatu is provided. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)