Oskar Adolf Hainari (7 March 1856 – 23 January 1910; surname until 1906 Forsström) was a Finnish secondary school teacher, journalist and politician, born in Tohmajärvi. He was a Member of the Diet of Finland in 1899, in 1900 and from 1904 to 1905 and a Member of the Parliament of Finland from 1908 until his death in 1910, representing the Finnish Party.^[1]

You can help expand this article with text translated from the corresponding article in Finnish. (September 2020) 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 Finnish Wikipedia article at [[:fi:Oskar Hainari]]; see its history for attribution. You may also add the template {{Translated|fi|Oskar Hainari}} to the talk page. For more guidance, see Wikipedia:Translation.