One of the curious aspects of the U.S. Presidency is the disproportionate religious affiliations of Presidents, compared to the U.S. population as a whole. The two largest religious bodies in the U.S. are the Catholic Church and the Southern Baptist Convention -- and the country has managed one Catholic president and four Baptist presidents. On the other hand, more Presidents have been members of the Episcopal church than any other body -- and the Episcopal church is a small -- and shrinking -- Protestant denomination.
Historical purists will note that Theodore Roosevelt is listed as an Episcopalian. At various points during his lifetime, he was affiliated with both the Episcopal church and the Dutch Reformed church.
Thomas Jefferson, while not affiliating with an organized religious body as an adult, was born and raised in the Church of England as was considered an Episcopalian as late as 1789 (if not later).