The East Papuan languages is a defunct proposal for a family of Papuan languages spoken on the islands to the east of New Guinea, including New Britain, New Ireland, Bougainville, Solomon Islands, and the Santa Cruz Islands. There is no evidence that these languages are related to each other, and the Santa Cruz languages are no longer recognized as Papuan.

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All but two of the starred languages below (Yélî Dnye and Sulka) make a gender distinction in their pronouns. Several of the heavily Papuanized Austronesian languages of New Britain do as well. This suggests a pre-Austronesian language area in the region.

The East Papuan languages were proposed as a family by linguist Stephen Wurm (1975) and others. However, their work was preliminary, and there is little evidence that the East Papuan languages actually have a genetic relationship. For example, none of these fifteen languages marked with asterisks below share more than 2–3% of their basic vocabulary with any of the others. Dunn and colleagues (2005) tested the reliability of the proposed 2–3% cognates by randomizing the vocabulary lists and comparing them again. The nonsense comparisons produced the same 2–3% of "shared" vocabulary, demonstrating that the proposed cognates of the East Papuan languages, and even of proposed families within the East Papuan languages, are as likely to be due to chance as to any genealogical relationship. Thus in a conservative classification, many of the East Papuan languages would be considered language isolates.

Since the islands in question have been settled for at least 35,000 years, their considerable linguistic diversity is unsurprising. However, Malcolm Ross (2001; 2005) has presented evidence from comparing pronouns from nineteen of these languages that several of the lower-level branches of East Papuan may indeed be valid families. This is the classification adopted here. For Wurm's more inclusive classification, see the Glottolog page here.

The tables below give lexical comparisons for the East Papuan languages (i.e., all Papuan languages spoken in New Britain and islands to the east), with languages listed roughly from west to east. All lexical items are from the Trans-New Guinea database^[1] unless noted otherwise.

• Papuan languages