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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
Non-denominational Evangelical Protestant
----
159 95,218 49.30
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 110 56,985 29.51
Catholic Church Catholic Catholicism 71 278,340 144.12
Evangelical Lutheran Church in America Mainline Protestant Lutheran 68 25,789 13.35
Assemblies of God Evangelical Protestant Pentecostal 63 25,937 13.43
Southern Baptist Convention Evangelical Protestant Baptist 55 6,694 3.47
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 54 24,909 12.90
United Methodist Church, The Mainline Protestant Methodist/Pietist 50 18,161 9.40
American Baptist Churches in the USA Mainline Protestant Baptist 42 12,531 6.49
Buddhism, Mahayana Other Other Groups 39 18,185 9.42
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 38 7,287 3.77
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 35 14,971 7.75
Seventh-day Adventist Church Evangelical Protestant Adventist 34 11,148 5.77
United Church of Christ Mainline Protestant Presbyterian-Reformed 32 5,937 3.07
Church of the Nazarene Evangelical Protestant Holiness 29 4,540 2.35
Churches of Christ Evangelical Protestant Baptist 29 3,618 1.87
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 29 8,690 4.50
Christian and Missionary Alliance, The Evangelical Protestant Holiness 26 3,897 2.02
Jehovah's Witnesses Other Adventist 26 --- ---
Bahá'í Other Other Groups 22 2,946 1.53
Converge Worldwide/Baptist General Conference Evangelical Protestant Baptist 22 4,590 2.38
Muslim Estimate Other Other Groups 21 12,288 6.36
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 19 5,307 2.75
Buddhism, Vajrayana Other Other Groups 17 1,195 0.62
Church of Christ, Scientist Other Christian Science 16 --- ---
Hindu, Post Renaissance Other Other Groups 15 478 0.25
Christian Churches and Churches of Christ Evangelical Protestant Baptist 14 8,732 4.52
Free Methodist Church of North America Evangelical Protestant Holiness 13 3,715 1.92
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 13 1,555 0.81
Christian Church (Disciples of Christ) Mainline Protestant Baptist 12 1,820 0.94
Christian Reformed Church in North America Evangelical Protestant Presbyterian-Reformed 12 1,159 0.60
Church of God in Christ Black Protestant Pentecostal 12 3,357 1.74
Conservative Baptist Association of America Evangelical Protestant Baptist 11 --- ---
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 10 724 0.37
General Association of Regular Baptist Churches Evangelical Protestant Baptist 9 --- ---
United Pentecostal Church International Evangelical Protestant Pentecostal 9 --- ---
Hindu, Indian-American Hindu Temple Assoc. Other Other Groups 8 3,263 1.69
Korean Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 8 --- ---
Orthodox Judaism Other Judaism 8 2,600 1.35
Unitarian Universalist Association of Congregations Other Liberal 8 3,475 1.80
Buddhism, Theravada Other Other Groups 7 4,495 2.33
Calvary Chapel Fellowship Churches Evangelical Protestant Pentecostal 7 --- ---
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 7 395 0.20
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 7 1,170 0.61
Independent Yearly Meetings of Friends* Mainline Protestant European Free-Church 6 338 0.18
Korean-American Presbyterian Church Evangelical Protestant Presbyterian-Reformed 6 --- ---
Reform Judaism Other Judaism 6 9,104 4.71
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 6 1,091 0.56
Community of Christ Other Latter-day Saints 5 835 0.43
Salvation Army Evangelical Protestant Holiness 5 2,762 1.43
U.S. Mennonite Brethren Evangelical Protestant European Free-Church 5 576 0.30
African Methodist Episcopal Church Black Protestant Methodist/Pietist 4 2,101 1.09
Anglican Church in North America Evangelical Protestant Episcopalianism/Anglicanism 4 --- ---
Independent Fundamental Churches of America Evangelical Protestant Ind. Fundamentalist 4 --- ---
Lutheran Congregations in Mission for Christ Evangelical Protestant Lutheran 4 1,431 0.74
Reformed Baptist Churches Evangelical Protestant Baptist 4 --- ---
Unity Churches, Association of Other Other Groups 4 --- ---
Vineyard USA Evangelical Protestant Pentecostal 4 834 0.43
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 3 312 0.16
Christian Brethren Evangelical Protestant Ind. Fundamentalist 3 --- ---
Church of God of Prophecy Evangelical Protestant Pentecostal 3 148 0.08
Church of the Brethren Evangelical Protestant European Free-Church 3 217 0.11
Eritrean Orthodox Orthodox Eastern Liturgical (Orthodox) 3 1,400 0.72
Evangelical Church, The Evangelical Protestant Holiness 3 --- ---
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 3 4,765 2.47
Hindu, Renaissance Other Other Groups 3 472 0.24
North American Baptist Conference Evangelical Protestant Baptist 3 182 0.09
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 3 995 0.52
Sikh Other Other Groups 3 --- ---
American Baptist Association, The Evangelical Protestant Baptist 2 222 0.11
Christian Methodist Episcopal Church Black Protestant Methodist/Pietist 2 180 0.09
Church of the Lutheran Brethren of America Evangelical Protestant Lutheran 2 270 0.14
Conservative Judaism Other Judaism 2 3,108 1.61
Evangelical Friends Church International* Evangelical Protestant European Free-Church 2 205 0.11
Grace Gospel Fellowship Evangelical Protestant Ind. Fundamentalist 2 --- ---
Independent Baptist Fellowship International Evangelical Protestant Baptist 2 --- ---
Korean Presbyterian Church Abroad Evangelical Protestant Presbyterian-Reformed 2 --- ---
Mennonite Church USA Evangelical Protestant European Free-Church 2 188 0.10
Missionary Church, The Evangelical Protestant Holiness 2 13 0.01
National Missionary Baptist Convention, Inc. Black Protestant Baptist 2 480 0.25
New Apostolic Church of North America, National Organization of the Other Other Groups 2 --- ---
Reformed Church in America Mainline Protestant Presbyterian-Reformed 2 265 0.14
Russian Orthodox Church Outside of Russia Orthodox Eastern Liturgical (Orthodox) 2 365 0.19
Apostolic Faith Mission of Portland, OR Evangelical Protestant Pentecostal 1 42 0.02
Apostolic Lutheran Church of America Evangelical Protestant Lutheran 1 --- ---
Armenian Church of North America (Catholicosate of Etchmiadzin) Orthodox Eastern Liturgical (Orthodox) 1 2,500 1.29
Association of Free Lutheran Congregations Evangelical Protestant Lutheran 1 --- ---
Association of Reformed Baptist Churches of America Evangelical Protestant Baptist 1 --- ---
Communion of Reformed Evangelical Churches Evangelical Protestant Presbyterian-Reformed 1 --- ---
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) 1 180 0.09
Ethiopian Orthodox Orthodox Eastern Liturgical (Orthodox) 1 --- ---
Evangelical Methodist Church Evangelical Protestant Methodist/Pietist 1 --- ---
Evangelical Presbyterian Church Evangelical Protestant Presbyterian-Reformed 1 745 0.39
Grace Brethren Churches, Fellowship of Mainline Protestant European Free-Church 1 --- ---
Hindu, Traditional Temples Other Other Groups 1 150 0.08
Holy Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 1 130 0.07
International Churches of Christ Evangelical Protestant Baptist 1 629 0.33
Malankara Archdiocese of the Syrian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 1 72 0.04
Malankara Orthodox Syrian Church Orthodox Eastern Liturgical (Orthodox) 1 75 0.04
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 1 49 0.03
National Association of Congregational Christian Churches Mainline Protestant Presbyterian-Reformed 1 36 0.02
National Association of Free Will Baptists Evangelical Protestant Baptist 1 49 0.03
National Baptist Convention, USA, Inc. Black Protestant Baptist 1 600 0.31
National Spiritualist Association of Churches Other Spiritualist 1 --- ---
North American Lutheran Church Evangelical Protestant Lutheran 1 --- ---
Open Bible Standard Churches, Inc. Evangelical Protestant Pentecostal 1 70 0.04
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 1 216 0.11
Pentecostal Church of God Evangelical Protestant Pentecostal 1 109 0.06
Reconstructionist Judaism Other Judaism 1 113 0.06
Reformed Presbyterian Church of North America Evangelical Protestant Presbyterian-Reformed 1 83 0.04
Serbian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) 1 1,500 0.78
Seventh Day Baptist General Conference, USA and Canada Evangelical Protestant Baptist 1 65 0.03
Swedenborgian Church Other Spiritualist 1 --- ---
Tao Other Other Groups 1 --- ---
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) 1 150 0.08
Union of Messianic Jewish Congregations Other Judaism 1 --- ---
Vicariate for the Palestinian/Jordanian Orthodox Christian Communities Orthodox Eastern Liturgical (Orthodox) 1 125 0.06
Zoroastrian Other Other Groups 1 21 0.01
Totals: 1,459 726,669  

The population of King County, Washington was 1,931,249 in 2010; in 2000 it was 1,737,034. The total population changed 11.2%. The adherent totals of the religious groups listed above (726,669) included 37.6% of the total population in 2010.

* 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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