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Nassau County (New York)

Religious Traditions, 2010

39,923 13,189 50,181 677,149 16,758 102,012 440,320
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]


Religious Bodies Tradition Family Congregations Adherents Adherence Rate
Jewish Other Judaism 74 49,392 37.37
Catholic Church Catholic Catholicism 68 547,818 414.52
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 45 28,710 21.72
Evangelical Lutheran Church in America Mainline Protestant Lutheran 39 25,611 19.38
United Methodist Church, The Mainline Protestant Methodist/Pietist 38 24,676 18.67
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 23 9,542 7.22
Reformed Church in America Mainline Protestant Presbyterian-Reformed 11 4,636 3.51
African Methodist Episcopal Zion Church Black Protestant Methodist/Pietist 10 8,216 6.22
Assemblies of God Evangelical Protestant Pentecostal 10 1,576 1.19
United Church of Christ Mainline Protestant Presbyterian-Reformed 10 5,963 4.51
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran 9 6,335 4.79
Seventh-day Adventist Church Evangelical Protestant Adventist 9 1,641 1.24
American Baptist Churches in the USA Mainline Protestant Baptist 8 3,208 2.43
Conservative Baptist Association of America Evangelical Protestant Baptist 7 1,497 1.13
Church of the Nazarene Evangelical Protestant Holiness 6 1,146 0.87
Christian Brethren Evangelical Protestant Ind. Fundamentalist 4 370 0.28
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 4 57 0.04
Churches of Christ Evangelical Protestant Baptist 4 433 0.33
Unitarian Universalist Association of Congregations Other Liberal 4 994 0.75
Christian and Missionary Alliance, The Evangelical Protestant Holiness 3 153 0.12
Christian Churches and Churches of Christ Evangelical Protestant Baptist 3 153 0.12
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 3 971 0.73
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 3 230 0.17
Friends (Quakers) Mainline Protestant European Free-Church 3 650 0.49
Southern Baptist Convention Evangelical Protestant Baptist 3 271 0.21
Salvation Army Evangelical Protestant Holiness 2 1,391 1.05
Christian Church (Disciples of Christ) Mainline Protestant Baptist 1 123 0.09
Church of God (Anderson, Indiana) Evangelical Protestant Holiness 1 363 0.27
Evangelical Covenant Church, The Evangelical Protestant Methodist/Pietist 1 79 0.06
North American Baptist Conference Evangelical Protestant Baptist 1 108 0.08
Orthodox Presbyterian Church, The Evangelical Protestant Presbyterian-Reformed 1 124 0.09
Ukrainian Orthodox Church of the USA Orthodox Eastern Liturgical (Orthodox) 1 245 0.19
American Association of Lutheran Churches Evangelical Protestant Lutheran 0 0 0.00
American Carpatho-Russian Orthodox Diocese Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Black Baptists Estimate Evangelical Protestant Baptist 0 0 0.00
Church of Christ, Scientist Other Christian Science 0 0 0.00
Church of God of Prophecy Evangelical Protestant Pentecostal 0 0 0.00
Foursquare Gospel, International Church of the Evangelical Protestant Pentecostal 0 0 0.00
Greek Orthodox Archdiocese of America Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Independent, Charismatic Churches Evangelical Protestant Pentecostal 0 0 0.00
Independent, Non-Charismatic Churches Evangelical Protestant
0 0 0.00
Metropolitan Community Churches, Universal Fellowship of Mainline Protestant Other Groups 0 100 0.08
Orthodox Church in America Orthodox Eastern Liturgical (Orthodox) 0 0 0.00
Totals: 409 726,782  

The population of Nassau County, New York was 1,321,582 in 1980. The adherent totals of the religious groups listed above (726,782) included 55.0% of the total population in 1980.

* 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 for those who are interested in these trends.


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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