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St. Tammany Parish (Louisiana)

Religious Traditions, 2010

42,583 2,762 16,798 53,149 2,430 116,018
Evangelical Protestant Black Protestant Mainline Protestant Catholic 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 % Change
Southern Baptist Convention Evangelical Protestant Baptist +11 -509 -2.3%
Assemblies of God Evangelical Protestant Pentecostal +4 +3308 +133.7%
Lutheran Church--Missouri Synod Evangelical Protestant Lutheran +3 +4 +0.2%
Catholic Church Catholic Catholicism +1 -4187 -7.3%
Church of the Nazarene Evangelical Protestant Holiness +1 -87 -24.9%
Churches of Christ Evangelical Protestant Baptist +1 -10 -1.5%
Christian Church (Disciples of Christ) Mainline Protestant Baptist 0 -175 -44.2%
Christian Churches and Churches of Christ Evangelical Protestant Baptist 0 +75 +78.1%
Church of God (Cleveland, Tennessee) Evangelical Protestant Pentecostal 0 -142 -11.1%
Church of God of Prophecy Evangelical Protestant Pentecostal 0 -33 -31.4%
Church of Jesus Christ of Latter-day Saints, The Other Latter-day Saints 0 +671 +67.1%
Episcopal Church Mainline Protestant Episcopalianism/Anglicanism 0 -291 -12.7%
Evangelical Free Church of America, The Evangelical Protestant Methodist/Pietist 0 0 0%
Evangelical Lutheran Church in America Mainline Protestant Lutheran 0 +34 +5.2%
Evangelical Presbyterian Church Evangelical Protestant Presbyterian-Reformed 0 +44 +57.1%
Muslim Estimate Other Other Groups 0 -533 -63.4%
Presbyterian Church (U.S.A.) Mainline Protestant Presbyterian-Reformed 0 -381 -33%
Presbyterian Church in America Evangelical Protestant Presbyterian-Reformed 0 +9 +7.8%
Seventh-day Adventist Church Evangelical Protestant Adventist 0 +189 +49%
Unitarian Universalist Association of Congregations Other Liberal 0 -57 -48.3%
United Methodist Church, The Mainline Protestant Methodist/Pietist 0 +3631 +38.3%
Wisconsin Evangelical Lutheran Synod Evangelical Protestant Lutheran 0 -68 -49.6%
Church of God (Anderson, Indiana) Evangelical Protestant Holiness -1 -76 -58.9%
Vineyard USA Evangelical Protestant Pentecostal -1 -131 -53.9%
American Baptist Association, The Evangelical Protestant Baptist -2 -1165 -87%
Bahá'í Other Other Groups -2 -3 -4.2%
African Methodist Episcopal Church Black Protestant Methodist/Pietist --- --- ---
Calvary Chapel Fellowship Churches Evangelical Protestant Pentecostal --- --- ---
Christian Brethren Evangelical Protestant Ind. Fundamentalist --- --- ---
Church of Christ (Holiness), U.S.A. Evangelical Protestant Holiness --- --- ---
Church of Christ, Scientist Other Christian Science --- --- ---
Church of God in Christ Black Protestant Pentecostal --- --- ---
Full Gospel Baptist Church Fellowship Black Protestant Baptist --- --- ---
Jehovah's Witnesses Other Adventist --- --- ---
National Missionary Baptist Convention, Inc. Black Protestant Baptist --- --- ---
New Apostolic Church of North America, National Organization of the Other Other Groups --- --- ---
Non-denominational Evangelical Protestant
--- --- ---
Reform Judaism Other Judaism --- --- ---
Reformed Baptist Churches Evangelical Protestant Baptist --- --- ---
United Pentecostal Church International Evangelical Protestant Pentecostal --- --- ---
Unity Churches, Association of Other Other Groups --- --- ---
Totals: +15 +117 +0.1%

The population of St. Tammany Parish, Louisiana was 191,268 in 2000; in 1990 it was 144,508. The total population changed 32.4%. The adherent totals of the religious groups listed above (107,794) included 56.4% of the total population in 2000.

The population of St. Tammany Parish, Louisiana was 233,740 in 2010; in 2000 it was 191,268. The total population changed 22.2%. The adherent totals of the religious groups listed above (117,722) included 50.4% 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 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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