Sintra (Portuguese pronunciation: [ˈsĩtɾɐ]) is a town within the municipality of Sintra in the Grande Lisboa subregion (Lisbon Region) of Portugal. Owing to its 19th-century Romantic architecture and landscapes, it has become a major tourist centre, visited by many day-trippers who travel from the urbanized suburbs and capital of Lisbon.

In addition to the Sintra Mountains and Sintra-Cascais Nature Park, the parishes of the town of Sintra are dotted by royal retreats, estates, castles and buildings from the 8th-9th century, in addition to many buildings completed between the 15th and 19th century, including the Castelo dos Mouros, the Pena National Palace and the Sintra National Palace, resulting in its classification by UNESCO as a World Heritage Site in 1995.