Arquà Petrarca (Italian pronunciation: [arˈkwa ppeˈtrarka]) is a town and municipality (comune) in northeastern Italy, in the Veneto region, in the province of Padua.

Within the town boundaries lies the Coast Lake (Laghetto della Costa), one of the Prehistoric Pile Dwellings Around the Alps, since 2011 in the UNESCO World Heritage Sites list.

The legacy of the Roman domination is still present in toponyms (Bignago derives from Bennius, Mercurana from Mercurius) and archeological evidence, such as grave goods, imperial coins and sewage lines.

The village was probably established within a defensive line existing during the Barbaric age, connecting the Rocca of Monselice, a city at the center of the local political and administrative Longobard jurisdiction, with Valle San Giorgio, Cinto Euganeo and the plains at the east of the Euganean Hills.

The original village developed around this fortified height, called Monte Castello (Castle's hill), with two distinct nuclei growing near the two churches of St Mary and the Holy Trinity.