Founded in 1888, Celtic Football Club, is one of the World's most famous football clubs, and are the second most succesful Scottish side. Based in the Scottish city of Glasgow, the club is officially nicknamed the Bhoys, or unofficially the Hoops. Together with their city rivals Rangers they have dominated Scottish football over the years as the 'Old Firm' and form one of the most famous rivalries in sport. Their home kit is green and white hooped jerseys with white shorts . They play at the 60,830 seater Celtic Park, one of the most famous stadia in Europe.

Jock Stein became manager in 1965. A former player and team captain, Stein gained most of his fame as Celtic's manager, and is acknowledged as one of the greatest football managers of all time. He managed Celtic to its nine straight Scottish League wins from 1966 to 1974—a Scottish record, equalled by Rangers from 1989 to 1997.

1967 was to be Celtic's best ever year. Celtic won every competition it entered: the Scottish League, the Scottish Cup, the Scottish League Cup, the Glasgow Cup, and the Bhoys became the first British side to win the European Cup. The "Lisbon Lions", managed by Jock Stein and captained by Billy McNeill, defeated Inter Milan 2–1 in Lisbon, Portugal. Jimmy 'Jinky' Johnstone, Bobby Lennox and Bobby Murdoch were three of the greatest ever Celtic players who also played in that famous team, who today have a stand in Celtic Park dedicated to them.

Celtic reached the European Cup Final again in 1970 but were beaten 2–1 by Feyenoord in the San Siro Stadium, Milan.

Early in its history, Celtic decided to sign Protestant players, and has frequently had a number of Protestants on its roster. Today, the playing roster of Celtic is multinational, multiracial, and non-denominational.

In 2003 many fans travelled to see Celtic take part in the UEFA Cup final in Seville in southern Spain. Although Celtic lost the match in extra time despite two Henrik Larsson goals. The conduct of the Celtic supporters received much praise and supporters were awarded with Fair Play Awards from both FIFA and UEFA.