Eugen Kvaternik (31 October 1825 – 11 October 1871) was a Croatian nationalist politician and one of the founders of the Party of Rights, alongside Ante Starcevic.
Kvaternik was the leader of the 1871 Rakovica Revolt which was an attempt to create an independent Croatian state, at the time when it was part of Austria-Hungary.
In order to get foreign support for his cause Kvaternik visited the Russian Empire, France and the Kingdom of Sardinia.
He was also well known for anti-Austro-Hungarian speeches that he made as member of Croatian Parliament.