The Yukaghir languages (/ˈjuːkəɡɪər/ YOO-kə-geer or /juːkəˈɡɪər/ yoo-kə-GEER; also Yukagir, Jukagir) are a small family of two closely related surviving languages—Tundra and Kolyma Yukaghir—spoken by the Yukaghir in the Russian Far East living in the basin of the Kolyma River. At the 2002 Russian census, both Yukaghir languages taken together had 604 speakers. More recent reports from the field reveal that this number is far too high: Southern Yukaghir was reported to have had a maximum of 60 fluent speakers in 2009, while the Tundra Yukaghir language had around 60–70. The entire family, as such, is regarded as moribund. The Yukaghir have experienced a politically imposed language shift in recent times, resulting in a majority of speakers also speaking Russian and Yakut.

In the 2020–2021 Russian census, 516 people reported speaking a Yukaghir language as their native language.

The relationship of the Yukaghir languages with other language families is uncertain, though it has been suggested that they are distantly related to the Uralic languages, thus forming the putative Uralic–Yukaghir language family.

Michael Fortescue argued that Yukaghir is related to the Eskimo-Aleut languages along with Uralic languages, forming the Uralo-Siberian language family.

Tundra and Kolyma Yukaghir are the only two remnants of what used to be one of the dominant languages/language families of northeastern Siberia, spreading from the River Anadyr in the east to the River Lena in the west. On the basis of the evidence of early sources, it can be assumed that there existed a Yukaghir dialect continuum, with what is today Tundra Yukaghir and Kolyma Yukaghir at the extremes.

These two languages share only a relatively small part of the vocabulary and are not mutually intelligible. The basic grammatical structures, however, are very similar. Both languages have residual vowel harmony and a complex phonotactics of consonants. Both have rich agglutinative morphology and are strictly head-final. There is practically no finite subordination and very few coordinate structures. The most spectacular feature of TY and KY grammar is the split intransitive alignment system based on discourse-pragmatic features. In absence of narrow focus, the system is organised on the nominative–accusative basis; when focused, direct objects and subjects of intransitive verbs are co-aligned (special focus case, special focus agreement).

The two extant varieties of Yukaghir are:

Extinct varieties include Omok and Chuvan, which survived until the 19th century.