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Nassau County, New York - County Membership Report (2020)

Exact definitions of "congregations" and "adherents" vary by religious body. Congregations may be parishes, churches, synagogues, mosques, temples, or another site where a religious body has regularly scheduled worship services. Adherents generally are members, children who are not members, and others who are not members but are considered participants in the congregation.

[More information on the data sources]

Religious Bodies Tradition Family Congregations Adherents Adherence Rate
Catholic Church Catholic Catholic Liturgical Family 77 633,264 453.70
Muslim Estimate Islam Islam Family 14 48,336 34.63
Orthodox Judaism Judaism Judaism Family 45 40,000 28.66
Non-denominational Christian Churches Evangelical Protestant Other Groups Family 62 24,010 17.20
Conservative Judaism Judaism Judaism Family 26 19,707 14.12
Reform Judaism Judaism Judaism Family 19 15,692 11.24
Evangelical Lutheran Church in America Mainline Protestant Lutheran Family 36 12,262 8.79
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) Family 7 10,380 7.44
United Methodist Church Mainline Protestant Methodist Family 37 9,480 6.79
Episcopal Church Mainline Protestant Anglican/Episcopal Family 34 9,312 6.67
National Baptist Convention, USA, Inc. Black Protestant Baptist Family 13 8,664 6.21
Jehovah's Witnesses Jehovah's Witnesses Adventist Family 36 8,050 5.77
Assemblies of God, General Council of the Evangelical Protestant Pentecostal Family 36 6,284 4.50
Seventh-day Adventist Church Evangelical Protestant Adventist Family 22 4,785 3.43
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian/Reformed Family 21 4,423 3.17
Church of Jesus Christ of Latter-day Saints Latter-day Saints Latter-day Saints (Mormonism) Family 7 4,298 3.08
African Methodist Episcopal Church Black Protestant Methodist Family 7 3,602 2.58
Christian and Missionary Alliance Evangelical Protestant Holiness Family 11 3,541 2.54
Lutheran Church-Missouri Synod (LCMS) Evangelical Protestant Lutheran Family 9 3,446 2.47
Church of God in Christ Black Protestant Pentecostal Family 10 2,890 2.07
American Baptist Churches in the U.S.A. Mainline Protestant Baptist Family 11 2,474 1.77
United Church of Christ Mainline Protestant Congregationalists (United Church of Christ) Family 10 2,406 1.72
African Methodist Episcopal Zion Church Black Protestant Methodist Family 8 1,846 1.32
Coptic Orthodox Church Orthodox Eastern Liturgical (Orthodox) Family 1 1,625 1.16
Malankara (Indian) Orthodox Syrian Church Orthodox Eastern Liturgical (Orthodox) Family 5 1,567 1.12
Church of the Nazarene Evangelical Protestant Holiness Family 11 1,502 1.08
Reconstructionist Judaism Judaism Judaism Family 2 1,488 1.07
Hindu, Traditional Temples Hinduism Hinduism Family 3 1,080 0.77
Southern Baptist Convention Evangelical Protestant Baptist Family 8 929 0.67
Reformed Church in America Mainline Protestant Presbyterian/Reformed Family 9 922 0.66
Unitarian Universalist Association Other Christians Liberal Family 3 920 0.66
Presbyterian Church in America Evangelical Protestant Presbyterian/Reformed Family 6 899 0.64
Christian Churches and Churches of Christ Evangelical Protestant Restorationists Family 5 860 0.62
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal Family 19 857 0.61
Hindu Yoga and Meditation Hinduism 6 747 0.54
Churches of Christ Evangelical Protestant Restorationists Family 3 724 0.52
Salvation Army Evangelical Protestant Holiness Family 3 687 0.49
Buddhism, Mahayana Buddhism Buddhism Family 1 666 0.48
Association of Vineyard Churches Evangelical Protestant Pentecostal Family 1 580 0.42
Malankara Archdiocese of the Syrian Orthodox Church in North America Orthodox Eastern Liturgical (Orthodox) Family 2 492 0.35
National Missionary Baptist Convention of America Black Protestant Baptist Family 2 420 0.30
Church of God (Anderson, Indiana) Evangelical Protestant Holiness Family 2 400 0.29
Full Gospel Christian Assemblies International Evangelical Protestant Pentecostal Family 5 380 0.27
Russian Orthodox Church Outside of Russia, The Orthodox Eastern Liturgical (Orthodox) Family 3 305 0.22
National Baptist Convention of America International, Inc. Black Protestant Baptist Family 2 294 0.21
Baha'i Faith Other Other Groups Family 3 269 0.19
Orthodox Church in America, The Orthodox Eastern Liturgical (Orthodox) Family 2 265 0.19
Church of the Genuine Orthodox Christians of America Orthodox Eastern Liturgical (Orthodox) Family 1 250 0.18
Lutheran Congregations in Mission for Christ Evangelical Protestant Lutheran Family 2 236 0.17
Friends General Conference and Friends United Meeting, dually aligned meetings Mainline Protestant Friends/Brethren Family 5 209 0.15
Malankara Mar Thoma Church Other Christians Other Groups Family 1 200 0.14
Antiochian Orthodox Christian Archdiocese of North America Orthodox Eastern Liturgical (Orthodox) Family 1 150 0.11
Buddhism, Vajrayana Buddhism Buddhism Family 1 100 0.07
American Carpatho-Russian Orthodox Diocese of the USA Orthodox Eastern Liturgical (Orthodox) Family 1 70 0.05
Syrian (Syriac) Orthodox Church of Antioch Orthodox Eastern Liturgical (Orthodox) Family 1 40 0.03
Conservative Congregational Christian Conference Evangelical Protestant Presbyterian/Reformed Family 1 14 0.01
Christian Church (Disciples of Christ) Mainline Protestant Restorationists Family 3 0 0.00
Evangelical Covenant Church Evangelical Protestant Methodist Family 1 0 0.00
Christadelphians Other Christians Other Groups Family 1
Elim Fellowship Evangelical Protestant Pentecostal Family 1
American Ethical Union Other Liberal Family 1
International Communion of the Charismatic Episcopal Church Evangelical Protestant Anglican/Episcopal Family 1
Wesleyan Church Evangelical Protestant Holiness Family 1
Reformed Baptist Network Evangelical Protestant 1
Apostolic Faith Mission of Portland, Oregon Evangelical Protestant Pentecostal Family 1
Associate Reformed Presbyterian Church (General Synod) Evangelical Protestant Presbyterian/Reformed Family 1
Converge Worldwide Evangelical Protestant Baptist Family 3
Unity Churches, Association of Other Christians Other Groups Family 2
General Conference of the Church of God (Seventh Day) Evangelical Protestant Adventist Family 1
Church of God of Prophecy Evangelical Protestant Pentecostal Family 8
Conservative Baptist Association of America (CBAmerica) Evangelical Protestant Baptist Family 5
Evangelical Free Church of America Evangelical Protestant Methodist Family 4
International Fellowship of Christian Assemblies Evangelical Protestant Pentecostal Family 3
International Council of Community Churches Mainline Protestant Presbyterian/Reformed Family 1
Jain Other Other Groups Family 1
American Association of Lutheran Churches Evangelical Protestant Lutheran Family 1
National Spiritualist Association of Churches Other Spiritualist Family 1
New Apostolic Church USA Other Christians Other Groups Family 2
North American Baptist Conference Evangelical Protestant Baptist Family 1
Orthodox Presbyterian Church Evangelical Protestant Presbyterian/Reformed Family 2
Polish National Catholic Church of America Catholic Catholic Liturgical Family 1
Christian Brethren (Plymouth Brethren) Evangelical Protestant Independent Fundamentalist Family 8
General Association of Regular Baptist Churches Evangelical Protestant Baptist Family 2
American Sikh Council Other Other Groups Family 4
Union of Messianic Jewish Congregations Other Christians Other Groups Family 2
United Pentecostal Church International Evangelical Protestant Pentecostal Family 12
           

Religious Traditions (1980 - 2020), Percent of Population


The population of this county was 1,395,774 in 2020. The adherent totals of the religious groups listed above (899,299) included 64.4% of the total population in 2020. The adherence rate is the number of adherents of a given group per 1,000 people in the general population.

Note that data collection methods for religious bodies change over time, affecting the comparability of statistics. For further information, see the U.S. Religion Census website at https://www.usreligioncensus.org/.

The 2020 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include data for 372 religious bodies or groups. Of these, the ASARB was able to gather data on congregations and adherents for 217 and on congregations only for 155.

[More information on the data sources]

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