The Philadelphia Savings Fund Society (PSFS), originally called the Philadelphia Saving Fund Society, was a savings bank headquartered in Philadelphia, Pennsylvania, United States. PSFS was founded in December 1816, the first savings bank to organize and do business in the United States. The bank would develop as one of the largest savings banks in the United States and became a Philadelphia institution. Generations of Philadelphians first opened accounts as children and became lifelong depositors.