The Jones Block is a historic commercial building at 49—53 Park Street in Adams, Massachusetts. It is a three story brick structure, topped by a flat roof, with a decorative band and dentil molding at the roof line, and round-arch windows on the upper floors. It is one of the four brick buildings on Park Street, along with the P. J. Barrett Block, Armory Block, and the Mausert Block, opposite the Town Hall.