The Union of Liberation (Russian: Союз Освобождения, Soyuz Osvobozhdeniya) was a liberal political group founded in Saint Petersburg, Russia in January 1904 under the influence of Peter Berngardovich Struve, a former Marxist. Its goal was originally the replacement of the absolutism of the Tsar with a constitutional monarchy. Its other goals included an equal, secret and direct vote for all Russian citizens and the self-determination of different nationalities (such as the Poles) that lived in the Russian Empire.^[1]

You can help expand this article with text translated from the corresponding article in Russian. (April 2018) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Russian Wikipedia article at [[:ru:Союз освобождения]]; see its history for attribution. You should also add the template {{Translated|ru|Союз освобождения}} to the talk page. For more guidance, see Wikipedia:Translation.

You can help expand this article with text translated from the corresponding article in Ukrainian. (May 2023) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 332 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Ukrainian Wikipedia article at [[:uk:Союз визволення]]; see its history for attribution. You should also add the template {{Translated|uk|Союз визволення}} to the talk page. For more guidance, see Wikipedia:Translation.

After the Russian Revolution of 1905 and the establishment of the Constitutional Democratic Party, most of the members of the Union of Liberation joined the Kadets and the group dissolved the same year.

The origins of the Union of Liberation can be traced back to 1902 when Russian liberal exiles created a periodical called Osvobozhdeniye (Liberation) which included ideas such as a constitutional monarchy.