Montemarciano is a comune, or municipality, located in the Province of Ancona within the Marche region of central Italy. It is situated approximately 15 kilometres, or about 9 miles, west of the city of Ancona.
The town serves as a local administrative center within its province. Its geographical position places it in the heart of the Marche region, characterized by its proximity to the Adriatic coast and the surrounding inland territories.