This is a list of the monarchs of Finland until it became a republic in 1919; that is, the Kings of Sweden with Regents and Viceroys of the Kalmar Union, the Grand Dukes of Finland, up to the two-year Regent period following the independence in 1917, with a brief flirtation with a truly domestic monarchy.
Almost nothing is known about the Ancient kings of Finland. Even though no record of ancient kings in Finland exists, prehistoric Finland probably had chieftains called "kings", as the loanword kuningas, "king", has existed in the same meaning in the Finnish language since early Germanic times, when it was borrowed.
The nation of Finland has never been an independent sovereign monarchy: no attempt to establish one was crowned with success. When it finally became established as a modern independent nation-state, it was - despite a very brief flirtation with monarchy - in the form of a republic.
The attempt to create a Kingdom of Finland in 1742 is a little known chapter in the history of Finland. Following the Russian occupation in the Russo-Swedish War (1741–1743) and vague promises of making the country independent, Finns elected the then Duke Peter of Holstein-Gottorp (who later became heir to the throne of Russia and tsar as Peter III) as the King of Finland. However, the political situation had outgrown the idea of Finnish independence and it quickly evaporated.