Baileyville is a census-designated place in the southern portion of Ferguson Township, Centre County, Pennsylvania. It is part of Happy Valley and the larger Nittany Valley. As of the 2020 census, the population was 217. The community is located southeast of Marengo, west of Ramblewood on Pennsylvania Route 45, locally known as Pine Grove Road. Baileyville borders Pennsylvania Furnace on the Centre-Hundington County line.