The Williamsburgh Savings Bank was a financial institution in Brooklyn, New York, from 1851 to 1986. The bank was incorporated in 1851 under legislation passed by the New York State Assembly. The bank continued to operate until a series of mergers brought the bank into the HSBC group late in the 20th century.

The Williamsburgh Savings Bank Building, also known as the Weylin and 175 Broadway, is a former bank building at 175 Broadway in the Williamsburg neighborhood of Brooklyn in New York City. Constructed as the headquarters of the Williamsburgh Savings Bank in 1875 and subsequently expanded several times, it occupies the northwest corner of Broadway and Driggs Avenue, just south of the Williamsburg Bridge. The Williamsburgh Savings Bank Building was designed in the Classical Revival style by George B. Post, with interiors by Peter B. Wight.