Villa Nova is an unincorporated community in Saint Marys Township, Auglaize County, Ohio, United States. It is located just west of Saint Marys on the northeastern corner of Grand Lake at the intersection of Ohio State Route 703 (Celina Road) and Ohio State Route 364 (Park Road), at 40°32′43″N 84°25′29″W / 40.54528°N 84.42472°W.