Languages written in a Cyrillic alphabet

This is a list of languages that have been written in the Cyrillic script at one time or another. See also early Cyrillic alphabet.

Indo-European languages

Romance languages
- Romanian (up to the 19th century, and a different form of Cyrillic in Moldova from 1940–89 exclusively; now Cyrillic is used in Transnistria officially and in the rest of the country in everyday communication by some groups of people; see Moldovan alphabet)
- Ladino in occasional Bulgarian Sephardic publications.

(This group is not assumed to comprise genetically related subgroups.)

Altay
Azerbaijani/Azeri (1939–91, exclusively in Cyrillic, since 1991 officially in Roman)
Balkar
Bashkir
Chuvash
Crimean Tatar (1938–91)
Gagauz (1957-1990s, exclusively in Cyrillic, since 1990s officially in Roman, but in reality in everyday communication Cyrillic is used alongside with Roman script)
Kazakh
Karachay
Karakalpak (1940s–1990s)
Karaim language (20-th century)
Khakas
Kumyk
Kyrgyz
Nogai
Tatar (since 1939)
Turkmen (1940–94 exclusively in Cyrillic, since 1994 officially in Roman, but in reality in everyday communication Cyrillic is used alongside with Roman script)
Tuvan
Uyghur (Called Uyghur Siril Yëziqi. Used along with Uyghur Ereb Yëziqi, Uyghur Latin Yëziqi and Uyghur Pinyin Yëziqi)
Uzbek (1941–98 exclusively in Cyrillic, since 1998 Cyrillic is used alongside with Roman script, which was prescribed as the future alphabet of Uzbek)
Yakut

Samoyedic languages
- Nenets (since 1937)
- Selkup (since 1950s writing recently is not used)
Uralic languages
- Karelian (until 1921 and 1937–1940)
- Khanty
- Mansi (since 1937 writing has not received distribution)
- Komi
  - Komi-Zyrian (since 17th century, modern alphabet since 1930s)
  - Komi-Permyak
- Mari (since 19th century)
- Mordvin languages
  - Erzya (since 18th century)
  - Moksha (since 18th century)
- Sami (in Russia, since 1980s)
  - Kildin Sami
- Udmurt