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King County (Washington)

Religious Traditions, 2010

204,523 7,030 104,806 278,340 12,257 119,713 1,204,580
Evangelical Protestant Black Protestant Mainline Protestant Catholic Orthodox Other Unclaimed

Congregational adherents include all full members, their children, and others who regularly attend services. The 2010 reports contain incomplete counts of congregations and adherents belonging to the eight largest historically African-American denominations. These denominations are not included in the 2000 reports and are largely missing from the 1990 and 1980 reports.
[More information on the data sources]

Reports


Religious Bodies Tradition Family Congregations Adherents Adherence Rate
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 91 38,195 25.34
Evangelical Lutheran Church in America Mainline Protestant Lutheran 70 38,704 25.68
Assemblies of God Evangelical Protestant Pentecostal 60 18,586 12.33
Catholic Church Catholic Catholicism 60 211,528 140.33
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 58 25,101 16.65
United Methodist Church, The Mainline Protestant Methodist/Pietist 48 21,564 14.31
American Baptist Churches in the USA Mainline Protestant Baptist 42 13,198 8.76
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 37 17,552 11.64
Southern Baptist Convention Evangelical Protestant Baptist 36 11,334 7.52
United Church of Christ Mainline Protestant Presbyterian-Reformed 33 8,506 5.64
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 31 11,022 7.31
Churches of Christ Evangelical Protestant Baptist 28 4,719 3.13
Church of Christ, Scientist Other Christian Science 26 --- ---
Church of the Nazarene Evangelical Protestant Holiness 24 5,267 3.49
Seventh-day Adventist Church Evangelical Protestant Adventist 23 7,164 4.75
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 20 7,546 5.01
Christian and Missionary Alliance, The Evangelical Protestant Holiness 17 3,859 2.56
Independent, Charismatic Churches Evangelical Protestant Pentecostal 16 14,485 9.61
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 15 3,635 2.41
Free Methodist Church of North America Evangelical Protestant Holiness 15 2,585 1.71
Christian Churches and Churches of Christ Evangelical Protestant Baptist 14 9,443 6.26
Christian Church (Disciples of Christ) Mainline Protestant Baptist 13 3,690 2.45
Jewish Other Judaism 13 21,975 14.58
Christian Brethren Evangelical Protestant Ind. Fundamentalist 9 1,100 0.73
Conservative Baptist Association of America Evangelical Protestant Baptist 9 --- ---
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 9 1,070 0.71
Friends (Quakers) Mainline Protestant European Free-Church 7 527 0.35
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 7 1,158 0.77
Unitarian Universalist Association of Congregations Other Liberal 7 2,280 1.51
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 6 457 0.30
Independent, Non-Charismatic Churches Evangelical Protestant
----
6 4,550 3.02
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 5 840 0.56
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 5 853 0.57
Church of the Brethren Evangelical Protestant European Free-Church 4 656 0.44
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 4 504 0.33
Salvation Army Evangelical Protestant Holiness 4 599 0.40
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 3 989 0.66
Church of God of Prophecy Evangelical Protestant Pentecostal 3 98 0.07
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 3 --- ---
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 3 --- ---
Pentecostal Church of God Evangelical Protestant Pentecostal 3 230 0.15
Wesleyan Church, The Evangelical Protestant Holiness 3 188 0.12
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 2 415 0.28
Evangelical Presbyterian Church Evangelical Protestant Presbyterian-Reformed 2 612 0.41
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 2 --- ---
Mennonite Church USA Evangelical Protestant European Free-Church 2 330 0.22
North American Baptist Conference Evangelical Protestant Baptist 2 210 0.14
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 2 --- ---
Reformed Church in America Mainline Protestant Presbyterian-Reformed 2 658 0.44
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant Baptist 2 75 0.05
Advent Christian Church Evangelical Protestant Adventist 1 216 0.14
American Association of Lutheran Churches Evangelical Protestant Lutheran 1 68 0.05
Apostolic Catholic Assyrian Church of the East, North American Dioceses Orthodox Eastern Liturgical (Orthodox) 1 135 0.09
Apostolic Lutheran Church of America Evangelical Protestant Lutheran 1 155 0.10
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 1 246 0.16
Church of God General Conference Evangelical Protestant Adventist 1 18 0.01
Estonian Evangelical Lutheran Church Mainline Protestant Lutheran 1 87 0.06
Evangelical Methodist Church Evangelical Protestant Methodist/Pietist 1 121 0.08
International Pentecostal Holiness Church Evangelical Protestant Pentecostal 1 32 0.02
Latvian Evangelical Lutheran Church in America Mainline Protestant Lutheran 1 517 0.34
Missionary Church, The Evangelical Protestant Holiness 1 0 0.00
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 1 64 0.04
National Association of Free Will Baptists Evangelical Protestant Baptist 1 73 0.05
Reformed Episcopal Church Evangelical Protestant Episcopalianism/Anglicanism 1 31 0.02
Black Baptists Estimate Evangelical Protestant Baptist --- 19,906 13.21
Totals: 920 539,726  

The population of King County, Washington was 1,507,319 in 1990; in 1980 it was 1,269,749. The total population changed 18.7%. The adherent totals of the religious groups listed above (539,726) included 35.8% of the total population in 1990.

* In an effort to better match the ASARB standards for adherents, a few religious bodies changed the way their adherents were reported in 2010, including the Catholic Church, Amish groups, Friends groups, Jewish groups, the Church of Jesus Christ of Latter-day Saints, Non-denominational Christian Churches, and the United Methodist Church. This change does not affect any of the data in the newly released 2010 U.S. Religion Census: Religious Congregations & Membership Study. In fact, the data for these groups are now more comparable to that of other bodies than it was in previous decadal reports.

However, the change in methodology can distort assessments on growth or decline between 2000 and 2010 for each of these groups. County-level 2000 data using the new methodology are not readily available. ASARB staff has adjusted some 2000 county-level adherent statistics to allow for a more accurate picture on growth or decline. The revised maps and charts are now available on-line at www.usreligioncensus.org for those who are interested in these trends.

Source

2010 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 236 religious groups, providing information on the number of their congregations and adherents within each state and county in the United States. Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Richard H. Taylor supervised the collection. These data originally appeared in 2010 U.S. Religion Census: Religious Congregations & Membership Study, published by the Association of Statisticians of American Religious Bodies (ASARB). [More information on the data collection]

The adherence rate provides the number of adherents of a particular group per 1,000 population. For example, in 2010 the Episcopal Church had an adherence rate of 7.6 in Autauga County, Alabama. This means that about 8 out of every 1,000 people in Autauga County were Episcopalian.


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