Calumet is a census-designated place in Mount Pleasant Township, Westmoreland County, Pennsylvania, United States. Although the United States Census Bureau included it as a census-designated place with the nearby community of Norvelt for the 2000 census, they are in reality two very different communities, each reflecting a different chapter in how the Great Depression affected rural Pennsylvanians. As of the 2010 census, Calumet-Norvelt was divided into two separate CDPs officially.