| Party: | Social Democratic |
| Constituency Mp: | Vyborg East |
| Term Start1: | 22 May 1907 |
| Term End1: | 31 July 1908 |
| Term Start2: | 1 June 1909 |
| Term End2: | 28 February 1910 |
| Parliament: | Finnish |
| Birth Date: | 1861 4, df=yes |
| Birth Place: | Impilahti, Grand Duchy of Finland |
| Death Place: | Bli Bli, Queensland |
| Nationality: | Finnish, Australian |
Basilius Suosaari (born Vasili Tichanoff, 4 April 1861 - 4 July 1939) was a Finnish-Australian politician and farmer. He was a Member of the Parliament of Finland for the Social Democratic Party in 1907-1908 and 1909-1910.[1]
Suosaari was born to a poor peasant family in Karelia, next to the Russian border. He was sold in a child auction for 13 years and worked later as a carpenter and a miner.[1] In 1911, Suosaari emigrated to Australia where he settled Bli Bli, Queensland and ran a sugarcane farm. He was also active in a local utopian socialist community founded by the followers of Matti Kurikka.[2]
Suosaari died in Bli Bli at the age of 78 in July 1939. He was buried to the Nambour Old Cemetery.[3]
Basilius Suosaari was married to Anna Brita Nupponen (1869-1958) with 11 children. Their son Axel Suosaari (1908-1934) was a talented swimmer who was the Australian Champion of 100 yards freestyle swimming in 1930-1931. The Finnish Olympic Committee asked him to compete in the 1928 Summer Olympics, but Suosaari refused as he wanted to swim for Australia.[4] [5]