The country has an area of 1,133 square miles and a population of 189,000. There are two main islands and seven islets in the group, with the majority of the population residing on the island of Upolu, where Apia, the capital, is located. The 2006 census revealed the following distribution of major religious groups: Congregational Christian, 33.6 percent; Roman Catholic, 19.4 percent; Methodist, 14.3 percent; The Church of Jesus Christ of Latter-day Saints (Mormons), 13.2 percent; Assemblies of God, 6.9 percent; and Seventh-day Adventist, 3.5 percent. Groups that together constitute less than 5 percent of the population include Jehovah's Witnesses, Congregational Church of Jesus, Nazarene, nondenominational Protestant, Baptist, Worship Centre, Peace Chapel, Samoa Evangelism, Elim Church, and Anglican. A comparison of the 2001 and 2006 censuses shows a slight decline in the membership of major or "mainline" denominations and an increase in participation in nontraditional and evangelical groups.
Although there is no official data, it is generally believed that there are also some practicing Hindus, Buddhists, and Jews in the country, primarily in Apia. The country has one of the world's seven Baha'i Houses of Worship; there is also a Muslim community that meets in a private home.
All religious groups are multiethnic; none is exclusively comprised of foreign nationals or native-born (Western) Samoans. There are no sizable foreign national or immigrant groups, with the exception of U.S. nationals from American Samoa. In recent years, there has been an increase in immigration of Chinese, Filipinos, and Fijians (mainly Indo-Fijians), often as service workers in local business or as contactors for building projects funded by foreign governments.