The Madang or Madang–Adelbert Range languages are a language family of Papua New Guinea. They were classified as a branch of Trans–New Guinea by Stephen Wurm, followed by Malcolm Ross. William A. Foley concurs that it is "highly likely" that the Madang languages are part of TNG, although the pronouns, the usual basis for classification in TNG, have been replaced in Madang. However, Timothy Usher finds no basis for concluding Madang is a branch of TNG.
Sidney Herbert Ray identified the Rai Coast family in 1919. In 1951 these were linked with the Mabuso languages by Arthur Capell to create his Madang family. John Z'graggen (1971, 1975) expanded Madang to languages of the Adelbert Range and renamed the family Madang–Adelbert Range, and Wurm (1975) adopted this as a branch of his Trans–New Guinea phylum. For the most part, Ross's (2005) Madang family includes the same languages as Z'graggen Madang–Adelbert Range, but the internal classification is different in several respects, such as the dissolution of the Brahman branch.
^Pawley, Andrew; Hammarström, Harald (2018). "The Trans New Guinea family". In Palmer, Bill (ed.). The Languages and Linguistics of the New Guinea Area: A Comprehensive Guide. The World of Linguistics. 4. Berlin: De Gruyter Mouton. pp. 21–196. ISBN978-3-11-028642-7.
Ross, Malcolm (2005). "Pronouns as a preliminary diagnostic for grouping Papuan languages". In Andrew Pawley; Robert Attenborough; Robin Hide; Jack Golson (eds.). Papuan pasts: cultural, linguistic and biological histories of Papuan-speaking peoples. Canberra: Pacific Linguistics. pp. 15–66. ISBN0858835622. OCLC67292782.
Pawley, Ross, & Osmond, 2005. Papuan languages and the Trans New Guinea phylum. Canberra: Pacific Linguistics. pp. 38–51.