The First Congress resolved to join the Russian Soviet Federative Socialist Republic in June 1918.

In 1920, the Central Executive Committee and the Council of People's Commissars of the RSFSR established the Votskaya Autonomous Region.

[7] During World War II, the workers of Udmurtia produced weapons for the Red Army.

[3] Industrial factories were evacuated from Ukraine to Udmurtia, thus increasing the ethnic Russian population and stimulating economic growth.

[2] 1918–24  Turkestan3 1918–41  Volga German4 1919–90  Bashkir 1920–25  Kirghiz2 1920–90  Tatar 1921–91  Adjarian 1921–45  Crimean 1921–91  Dagestan 1921–24  Mountain 1921–90  Nakhichevan 1922–91  Yakut 1923–90  Buryat1 1923–40  Karelian 1924–40  Moldavian 1924–29  Tajik 1925–92  Chuvash5 1925–36  Kazakh2 1926–36  Kirghiz 1931–92  Abkhaz 1932–92  Karakalpak 1934–90  Mordovian 1934–90  Udmurt6 1935–43  Kalmyk 1936–44  Checheno-Ingush 1936–44  Kabardino-Balkarian 1936–90  Komi 1936–90  Mari 1936–90  North Ossetian 1944–57  Kabardin 1956–91  Karelian 1957–92  Checheno-Ingush 1957–91  Kabardino-Balkarian 1958–90  Kalmyk 1961–92  Tuvan 1990–91  Gorno-Altai 1991–92  Crimean