Christianity is the dominant religion in the city of Philadelphia. According to a 2014 study by the Pew Research Center, 68% of the population of the city identified themselves as Christians. The majority of the population is Protestant, with the various Protestant and non-Catholic Christian denominations combined make up a majority of the Christian population at approximately 42% of the city's population; however, the largest single Christian denomination is Roman Catholic, at 26%. Metropolitan Philadelphia's Jewish population, the sixth largest in the United States, was estimated at 206,000 in 2001. There is also a significant Eastern Orthodox population. The greater Philadelphia area is home to one of the largest Lutheran communities in the United States (the largest on the East Coast).