The country has an area of 406,752 square kilometres and a population of 6.3 million. According to the 2002 national census, 89.6 percent of the population is Roman Catholic, and 6.2 percent is evangelical Protestant. Groups that constitute less than 5 percent of the population include Jehovah's Witnesses, Jews (Orthodox, Conservative, and Reform), The Church of Jesus Christ of Latter-day Saints (Mormons), Mennonites, Muslims, and Baha'is. A 2006 survey indicates similar results; however, 84.7 percent of respondents consider themselves Catholic, a decrease from 2002.
Native-born citizens tend to be Catholic, while immigrants generally belong to other religious groups. The eastern department of Alto Parana has a large Muslim community due to substantial immigration from the Middle East, particularly Lebanon. A large Mennonite community flourishes in the western department of Boquerón. Members of other religious groups are concentrated in the largest cities, including Asunción, Ciudad del Este, and Encarnación. Non-Catholic immigrant groups tend to have a higher per capita income than the primarily Catholic, native-born citizens. Membership in religious groups is high.