List of Presidential religious affiliations (by religion)

Baptist

• Warren Harding
• Harry Truman
• Jimmy Carter (Southern Baptist)
• Bill Clinton (Southern Baptist)
  

Congregationalist

• Calvin Coolidge
• John Adams (later Unitarian)
  

Disciples of Christ

• James Garfield
• Lyndon Johnson
• Ronald Reagan (also Presbyterian)
  

Dutch Reformed

• Martin Van Buren
• Theodore Roosevelt
  

Episcopalian

• George Washington
• James Madison
• James Monroe
• William Henry Harrison
• John Tyler
• Zachary Taylor
• Franklin Pierce
• Chester A. Arthur
• Franklin D. Roosevelt
• Gerald Ford
• George H. W. Bush
• George W. Bush (later Methodist)
  

Methodist

• James Polk (originally Presbyterian)
• Ulysses Grant (allegedly; his theology is unknown)
• William McKinley
• George W. Bush (originally Episcopalian)
  

Presbyterian

• Andrew Jackson
• James Polk (later Methodist)
• James Buchanan
• Grover Cleveland
• Benjamin Harrison
• Woodrow Wilson
• Dwight D. Eisenhower
• Ronald Reagan (also Disciples of Christ)
  

Quaker

• Herbert Hoover
• Richard Nixon
  

Roman Catholic

• John F. Kennedy
  

Unitarian

• John Adams
• John Quincy Adams
• Millard Fillmore
• William Howard Taft
  

United Church of Christ

• Barack Obama (later no affiliation)
  

Note that the 1957 merger which formed the U.C.C. included the Congregational Christian Churches.

No denominational affiliation

• Thomas Jefferson
• Abraham Lincoln
• Andrew Johnson
• Ulysses Grant
• Rutherford Hayes
• Barack Obama (previously United Church of Christ)