From the Pew Research Center –
Most U.S. adults identify with a particular religious denomination or group. They describe themselves as Catholic, Baptist, Methodist, Jewish, Mormon or Muslim – to name just a few of the hundreds of identities or affiliations that people give in surveys.
Others describe themselves as atheist, agnostic or say they have no particular religious affiliation. These are the conventional categories into which Americans sort themselves. But a new Pew Research Center analysis looks at beliefs and behaviors that cut across many denominations – important traits that unite people of different faiths, or that divide people who have the same religious affiliation – producing a new and revealing classification, or typology, of religion in America.