85,6% Lutheran and about 1% Orthodox.
There has been complete freedom of worship in Finland since 1923.
The Evangelical Lutheran Church is the country's biggest denomination : 89 % of the people are baptised as Lutherans while 1 % belong to the Finnish Orthodox Church.
Christianity, represented by the Roman Catholic Church, reached Finland before the end of the first millennium but the Church was not firmly established in the country until the 12th century.
This followed a missionary expedition to south-west Finland led by King Erik of Sweden accompanied by the English-born bishop Henry.
The influence of the Orthodox faith spread into the country from the east.