Accompanied by his wife, Michelle, and their daughters, Malia and Sasha, Obama strolled across Lafayette Square to attend St. John's Church. Sasha held her father's hand as they crossed the park.
Obama has attended the pale yellow Episcopal church three times previously, as well as other churches in the nation's capital.
A pew nine rows back from the altar at St. John's carries a brass plaque designating it as "The President's Pew." Church history claims that every president since the nation's fourth chief executive, James Madison, has visited.
Obama spent the afternoon playing golf.