Gualdicciolo is a curazia of San Marino, in the castello of Acquaviva. It is Acquaviva's most populated curazia.

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.