The Iroquoian languages are a language family of indigenous peoples of North America. They are known for their general lack of labial consonants. The Iroquoian languages are polysynthetic and head-marking.

As of 2008 and as of 2017, all surviving Iroquoian languages except Cherokee in Oklahoma and Mohawk are severely endangered or critically endangered, with only a few elderly speakers remaining. Cherokee in North Carolina is considered severely endangered.

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