An updated list of the caddisfly species occurring in Krabi and Phang Nga Provinces, southern Thailand, comprises 76 species. Among them, 69 species are found in Krabi Province and 17 in Phang Nga Province, 4 are new for science and 2 new for Thailand. New species from the families Hydroptilidac (Hydroptila nevdomek sp. n.), Polycentropodidac (Nyctiophylaxdosyhpor sp. n.), Psychomyiidae (Psychomyia dabudettak sp. n.), and Leptoceridae (Setodes pokamest sp. n.) are described. Hydroptila namcattien Malicky & Chantaramongkol 2007 and Setodes kybele Malicky & Chantaramongkol 2006 are new species for Thailand. Faunistic considerations and comparisons to other regions of Thailand arc provided.