The province of Trieste is a province in the autonomous Friuli-Venezia Giulia region of Italy. Its capital was the city of Trieste. It had an area of 212 square kilometres (82 sq mi) and it had a total population of 234,668. It had a coastal length of 48.1 kilometres (29.9 mi). Abolished in 2017, it was reestablished in 2019 as the regional decentralization entity of Trieste, and was reactivated on 1 July 2020.

Friuli-Venezia Giulia is one of the 20 regions of Italy and one of five autonomous regions with special statute. The regional capital is Trieste on the Gulf of Trieste, a bay of the Adriatic Sea.