The 2010 government census estimates the population to be 102,000, including 11,000 in Yap, 49,000 in Chuuk, 36,000 in Pohnpei, and 6,000 in Kosrae. Because of high emigration rates, the current population is likely to be less than the 2010 figure.
Although there is linguistic and cultural diversity within each of the country’s four states, its religious character is overwhelmingly Christian. Several Protestant denominations, as well as the Roman Catholic Church, are present in every state. The United Church of Christ is the main Protestant denomination. In Kosrae, 95 percent of the population is Protestant. In Pohnpei, the population is evenly divided between Protestants and Catholics. In Chuuk, an estimated 60 percent is Catholic and 40 percent Protestant. In Yap, an estimated 80 percent of the population is Catholic and the remainder Protestant. In addition to the United Church of Christ, Protestant denominations include Baptist, Assemblies of God, Salvation Army, and Seventh-day Adventists. Smaller groups include Jehovah’s Witnesses, The Church of Jesus Christ of Latter-day Saints (Mormons), and Bahais. There are increasing numbers of Mormons; in Pohnpei, about 5 percent of the population considers itself Mormon. Attendance at religious services is generally high. Churches are well supported by their congregations and play a significant role in civil society.
The majority of foreign workers are Filipino Catholics who have joined local Catholic churches. The Filipino Iglesia Ni Cristo has a church in Pohnpei.
Historic interdenominational rivalry and the conversion of clan leaders in Pohnpei resulted in religious divisions along clan lines that continue today, although intermarriage has blurred the lines considerably. More Protestants live on the western side of the island, while more Catholics live on the eastern side.