The William M. Cashin House, also known as Cashin Hall, is a dormitory in Amherst, Massachusetts named for William M. Cashin, original Trustee member for the UMass Building Authority from 1949-1969. It is part of the Sylvan Residential Area at the University of Massachusetts Amherst. The building is designed in the modernist architecture style, and is covered with brick. In 1980, the building was home to the first signs of the impending campus water shortage.