Figure 7.24:
Religious adherence in the United States. Increasing secularization in the United States has led to a complex mosaic on the American religious landscape. Secularization is most prevalent in the western United States, while religious adherence remains quite strong in the midsection of the country.
(Source: Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley, and Richard H. Taylor. 2012. 2010 U.S. Religion Census: Religious Congregations & Membership Study. Association of Statisticians of American Religious Bodies.)