Waterloo Community Mausoleum is a historic mausoleum located in Maplewood Cemetery at Waterloo, DeKalb County, Indiana. It was built in 1916, and is a one-story, rectangular limestone structure with simple Classical Revival style detail and Gothic buttresses. It measures 44 feet wide and 32 feet deep. The mausoleum was used for interments into the 1960s.It was added to the National Register of Historic Places in 2014.