The Iroquoian languages are a First Nation and Native American language family in North America. They are known for their general lack of labial consonants. Iroquoian languages are polysynthetic and head-marking.

Today, all surviving Iroquoian languages except Cherokee and Mohawk are severely endangered, with only a few elderly speakers remaining.

Family division

Scholars are finding that what has been called the Laurentian language appears to be more than one dialect or language.

In 1649 the tribes constituting the Huron and Petun confederations were displaced by war parties from Five Nations villages (Mithun 1985). Many of the survivors gathered, ultimately forming the Wyandot tribe. Ethnographic and linguistic field work with the Wyandot (Barbeau 1960) yielded enough documentation for scholars to characterize and classify the Huron and Petun languages.

The languages of the tribes that constituted the Wenrohronon, Neutral and the Erie confederations were very poorly documented. These groups were called Atiwandaronk, meaning 'they who understand the language' by the Huron. They are historically grouped with them.