This week is Passover and Easter, so religion in America seems a good blog topic. Gallup has been tracking religious affiliation in the US since 1948. In 2013, Gallup found that 3 out of 4 Americans identify as Christians. One in 6 reported having no religious affiliation (15%) or didn't answer (2%). One in 14 Americans belong to various other religions such as Judaism, Hinduism, Buddhism, etc.