Faithland – Mapping Religion Across America
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.
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Vivid maps
Mapped: The Safest and Most Dangerous States in America
How safe is your state? Our analysis of the 2025 U.S. News & World Report public safety rankings uncovers unexpected trends across America. Through interactive maps, we discover why New England tops the safest states and some others struggle with ongoing problems.
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Religious Adherent Density by U.S. County (1890 – 2020)
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.
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The Second-Largest Religious Group in Every U.S. County
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.
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Largest participating religious group (1906 – 2010)
Group with the largest number of adherents by U.S. county (1906 – 1910) The “Other” category includes religious groups with
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Black Protestant Population
Most Black Protestant counties in America (2010): 1. Bullock County, Alabama – 31.6% 2. Ouachita County, Arkansas – 31.3% 3.
Read MoreEvangelical protestant population (1936 – 2010)
Evangelical protestant population
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Mainline protestant population (1936 – 2010)
Mainline protestant population, 1936 – 2010 Mainline Protestant population, 2010 Most Mainline Protestant counties in America (2010): 1. Burke County,
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Orthodox Christians as a Percentage of all Residents (1952 – 2010)
Orthodox Christians as a Percentage of all Residents, 1952 – 2010 Orthodox Christians as a Percentage of all Residents, 2010
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Population penetration, Baha’i groups in the United States
Population penetration, Baha’i groups in the United States (1980 -2010) youtube Population penetration, Baha’i groups in the United States (2010)
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