Subiaco is a town in Logan County, Arkansas, United States. The population was 439 at the 2000 census. The town is named after Subiaco in the Lazio region of Italy. Subiaco is home to Subiaco Abbey and Academy, a Catholic monastery and private school.
Subiaco is located at 35°17′38″N 93°38′17″W / 35.29389°N 93.63806°W / 35.29389; -93.63806 (35.293759, -93.638034).
According to the United States Census Bureau, the town has a total area of 1.9 square miles (4.8 km²), all land.