Chelsea was the winner of the English Premier League in 1955.
Chelsea won the English Premier League in 2005, 2006 and 2010. They won the old first division in 1955, the equivalent of the Premier League now.
The winner of the Veikkausliiga league in 1955 was Kiffen.
Aberdeen were the winners of the Scottish Premier League in 1955.
The top scorer of the English Premier League-(EPL) in 1955 was Ronnie Allen.
Olympiacos was the Greek Super League winner in 1955.
UNV Slovan Bratislava were the winner of the Czech League in 1955.
The Aberdeen team won the Scottish Premier League in 1955.
Willem II was the winner of the Eredivisie league in 1955.
Chelsea Football Club has won the English Premier League three times ('04-'05, '05-'06, and '09-'10). Also, Chelsea won the first divison league cup in the 1954-1955 season, which was the top tier of English football before the creation of the English Premier League in 1992.
Manchester United had won 7 First Division titles before the English Premier League was established in 1992; 1907-08, 1910-11, 1951-52, 1955-56, 1964-65 and 1966-67.