Religion maps displaying different religions predominating in the world.
Explore the religious landscape of the U.S. from 1890 to 2010 through maps I created using ARDA data. See how religion has shaped different areas over time.
Read more: Faithland – Mapping Religion Across America
A look at the historic divide in Christianity that shaped Europe and beyond. Here’s what happened in 1054—and what often gets left out.
Read more: Christianity in 1054: East, West, and the Forgotten Paths
Based on ARDA’s 2020 U.S. Religion Census, about 161 million Americans are counted as religious adherents. This map shows where they’re most concentrated by land area, and an animation traces changes since 1890.
Read more: Religious Adherent Density by U.S. County (1890 – 2020)
A look at the runner-up religious affiliations in each U.S. county, from Black Protestant churches in the South to Catholic and non-denominational growth in the West and cities, based on official census data.
Read more: The Second-Largest Religious Group in Every U.S. CountyBetween 1378 and 1417, three men simultaneously claimed to be pope. European kingdoms divided over allegiances to Rome, Avignon, and Pisa, driven purely by political interests rather than religious disagreements.
Read more: When the Catholic Church Had Three Popes: The Western Schism of 1378-1417
Twenty-seven countries maintain official state religions in 2025. Islam dominates North Africa and the Middle East, Christianity persists in parts of Europe, Buddhism in Southeast Asia.
Read more: Which Countries Still Have Official State Religions?
Catholics lead the Northeast and Southwest, Southern Baptists fill the South, Mormons built their base in Utah, and Lutherans define the Upper Midwest. Each concentration traces back to immigration corridors, evangelical revivals, or planned settlements from centuries ago.
Read more: Which Religion Dominates Each US County
In Nevada County, Arkansas, more than one in three residents is counted as a Black Protestant adherent. Three maps show how concentrated that presence is across the Deep South, and how thin it becomes across the rest of the country.
Read more: The Geography of Black Protestant America
King County, Texas recorded the highest Evangelical Protestant share of any US county in 2020, at 45.25 percent. That is higher than any state’s own average, Alabama included.
Read more: Evangelical Protestant Population Mapped
Mainline protestant population, 1936 – 2010 Mainline Protestant population, 2010 Most Mainline Protestant counties in America (2010): 1. Burke County,
Read more: Mainline protestant population (1936 – 2010)
Orthodox Christians as a Percentage of all Residents, 1952 – 2010 Orthodox Christians as a Percentage of all Residents, 2010
Read more: Orthodox Christians as a Percentage of all Residents (1952 – 2010)
Population penetration, Baha’i groups in the United States (1980 -2010) youtube Population penetration, Baha’i groups in the United States (2010)
Read more: Population penetration, Baha’i groups in the United StatesMost Hindu counties in America: 1. Rabun County, Georgia – 8.9% 2. Juniata County, Pennsylvania – 6.3% 3. Saguache County,
Read more: Population penetration, Hindu groups in the United States