Gualdicciolo is a of San Marino, in the of Acquaviva. It is Acquaviva's most populated .
The village is situated in the western corner of San Marino, close to the borders with Italy and the municipalities of San Leo and Verucchio, in Emilia-Romagna. The nearest Italian village to Gualdicciolo is Torello, part of San Leo.
Due to its position in a flat valley, Gualdicciolo has one of the most developed industrial areas of the state, with many manufacturing factories.