The Nimboran languages are a small family of Papuan languages, spoken by the Nimboran people in the Grime River and Nawa River watershed in Jayapura Regency, that had been part of Stephen Wurm's Trans–New Guinea proposal. However, when proto-Nimboran pronouns are reconstructed (*genam "I" and kom or komot "thou"), they have little resemblance to the proto-TNG pronouns *na and *ga. Usher places them in a North Papuan stock that resembles Cowan's proposal.

Foley (2018) classifies the Nimboran languages separately as an independent language family.

The languages are:

The pronouns Ross (2005) reconstructs for proto-Nimboran are,

Below are pronouns in the Nimboran languages as given by Foley (2018):

As in Kaure, pronouns are not specified for number in the Nimboran language.

Some lexical reconstructions by Usher (2020) are:

The following basic vocabulary words are from Voorhoeve (1975), as cited in the Trans-New Guinea database.