Finnish Social Democratic politician who served as President of Finland during the 1980s and early 1990s. Prior to being elected President, he served as Finland's Prime Minister (from 1968 to 1970 and again from 1979 to 1982).
Before beginning his political career, he held executive positions at the Helsinki Workers' Savings Bank and at the Bank of Finland.
For his service in the Continuation War, he was awarded the Order of the Cross of Liberty.
His marriage to Taimi Tellervo resulted in a child named Assi Koivisto.
Both he and his successor, Martti Ahtisaari, supported the entrance of Finland into the European Union.