Religious Faith of American Adults, 2008

Of the 225 million American adults:
Evangelical Protestant 26.3%
Roman Catholic 23.9%
Mainline Protestant 18.1%
No religion 16.1%
Historically-black churches 6.9%
Other faiths (Jewish, Muslim, etc.) 4.7%
Other Christians 3.3%
Don’t know/refused 0.8%