Accompanied by his wife Michelle and daughters Sasha and Malia, Obama walked through Lafayette Square to attend the 10:30 morning service at St. John's Church.
Obama wore a dark-colored suit, while the first lady and Malia wore shades of purple and Sasha a floral green and white dress.
Obama has worshipped at St. John's previously, as well as at other churches in the nation's capital.
A pew nine rows back from the altar at St. John's carries a small brass plaque designating it as "The President's Pew." Church history claims that every president since James Madison has visited.