Islam is the second largest religion in Sweden, practiced by 5% of the population. Lutheran Christianity is officially the largest religion in Sweden, with 6.3 million Swedish citizens being members of the Church of Sweden.The remaining population is either irreligious or belongs to other religious groups.
Reference: Wikipedia. (2016) Religion in Sweden . Available from: < https://en.wikipedia.org/wiki/Religion_in_Sweden > [15 Feb 2016].