This paper examines the religious origins of political parties in Great Britain. To that avail, we digitize all 19th century censuses at the most micro level (Parish level). We merge these datasets to all electoral results in the 19th century and to the March 30, 1851, Religious Census. The latter is the only census in UK’s history to tally attendances for every single church and chapel in all of England and Wales. Our results indicate that support for Tories (Whigs) was significantly stronger where the Anglican Church (New Dissent) was stronger. These results are robust to the inclusion of various sociodemographic controls, suggesting that religion had an influence on party support over and above social class or economic interest.