Monfalcone (Italian pronunciation: [moɱfalˈkoːne]; Bisiacco: Mofalcòn; Friulian: Monfalcon; Slovene: Tržič; archaic German: Falkenberg) is a town and comune (municipality) in the Regional decentralization entity of Gorizia in Friuli-Venezia Giulia, northern Italy, located on the Gulf of Trieste.

After the foundation of the Roman city of Aquileia (181 BC), some thermal buildings were created on the hills, known as Insulae Clarae.

Conquered back by Venice, it was ravaged by the troops of Habsburg Emperor Maximilian I in 1513, who destroyed the Rocca fortress.

The first shipyards arose from about 1908 onwards, among them the Cantiere Navale Triestino company building steamships for the Austro-Americana Line based in Trieste.

Monfalcone is twinned with: In 2024 religious, cultural and ethnic factors gained importance with cricket being banned in the town.