Subiaco is a town in Logan County, Arkansas, United States. The population was 572 at the 2010 census. The town is named after Subiaco Abbey, which is located there, and which donated 80 acres in the early 20th century for a townsite and railroad connection. Founded as a priory in 1878, Subiaco Abbey was established and named by Pope Leo XIII in 1891, after the Italian city of that name in the Lazio region, where St. Benedict founded his first monastery.