The Siberian Turkic or Northeastern Common Turkic languages, are a sub-branch of the Turkic language family. The following table is based upon the classification scheme presented by Lars Johanson (1998). All languages of the branch combined have approximately 670,000 native and second language speakers, with most widely spoken members being Yakut (c. 450,000 speakers), Tuvan (c. 130,000 speakers), Northern Altai (c. 57,000 speakers) and Khakas (c. 29,000 speakers). Despite their usual English name, two major Turkic languages spoken in Siberia, Siberian Tatar and Southern Altai, are not classified as Siberian Turkic, but are rather part of the Kipchak subgroup. Many of these languages have a Yeniseian substratum.

Classification

Alexander Vovin (2017) notes that Tofa and other Siberian Turkic languages, especially Sayan Turkic, have Yeniseian loanwords.