The Slovak constitution guarantees religious freedom, but most of the people in Slovakia were baptised as children, as a result of family tradition. The largest religion in Slovakia are the Roman Catholics (68.9%), the second largest group are non-religious (13%), then Lutherans (6.9%), Greek Catholics (4.1%), Protestant Reformers (2.0%) and Orthodox Church (0.9%).

In general, it can be said that people in Slovakia are religious (at least, more religious than most of the European countries). Although, many Slovaks claim being part of a religion, but actually, except of days like Christmas or Easter they do not visit the church a lot (or never).