Friuli-Venezia Giulia (Italian: [friˈuːli veˈnɛttsja ˈdʒuːlja]) 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.

Friuli-Venezia Giulia has a population of 1,194,095 in an area of 7,924.36 square kilometres (3,059.61 sq mi) as of 2025. A natural opening to the sea for many central European countries, the region is traversed by the major transport routes between the east and west of Southern Europe. It encompasses the historical-geographical region of Friuli and a small portion of the historical region of Venezia Giulia—also known in English as the Julian March—each with its own distinct history, traditions and identity.

Friuli comes from the Latin term Forum Julii ('Julius' forum'), a center for commerce in the Roman times, which today corresponds to the city of Cividale. The denomination Venezia Giulia ('Julian Venetia', not referring to the city of Venice but to the Roman province of Venetia et Histria) was proposed by the Italian linguist Graziadio Isaia Ascoli, with the intention of marking the Italian cultural spirit of the area.

In Roman times, modern Friuli-Venezia Giulia was located within Regio X Venetia et Histria of Roman Italy. The traces of its Roman origin are visible all over the area. In fact, the city of Aquileia, founded in 181 BC, served as the regional capital and rose to prominence in the Augustan era.

Following the Lombard settlements in the 6th century, the historical paths of Friuli and Venezia Giulia began to diverge. In 568, Cividale del Friuli (the Roman Forum Iulii (from which the name Friuli is derived)) became the capital of the first Lombard dukedom in Italy. In the 6th century, the Alpine Slavs, ancestors of present-day Slovenes, settled the eastern areas of the region. They settled in the easternmost mountainous areas of Friuli known as the Friulian Slavia, as well as in the Karst Plateau and in the area north and south of Gorizia. In the 12th and 13th centuries, they also moved closer to Trieste.

In 774 Charlemagne conquered Lombard Italy and absorbed it into Francia (the Frankish Empire from 800), with the Lombard Duke of Friuli replaced by a Frankish one. In 787 Charlemagne established a new patriarch at Aquileia. The duchy was dissolved in 828 and partitioned into smaller counties. In 843 the Empire was partitioned in the Treaty of Verdun placing Friuli at the frontier between Middle Francia (later the Kingdom of Italy) and East Francia (later the Kingdom of Germany) and in 846 the former duchy was reconstituted as the March of Friuli. In 961 Otto the Great of Germany took control of the Kingdom of Italy and established the Holy Roman Empire. In 1077, the Holy Roman Emperor recognized the territorial powers of the Patriarchate of Aquileia that temporarily extended its rule to areas to the east; however, by the 12th century the County of Gorizia had become independent. Trieste developed into the Imperial Free City of Trieste. The coastal territory between Gorizia and Trieste was controlled by the March of Carniola (Duchy of Carniola from 1364).

Friuli became Venetian territory in 1420; Trieste and Gorizia, which remained within the Holy Roman Empire, came under Habsburg (Austrian) dominance in 1382 and 1500 respectively. The Venetian fortress of Gradisca d'Isonzo was retaken by the Empire in 1511 and incorporated into Gorizia but Monfalcone to the south remained an effective Venetian exclave. Pordenone was a corpus separatum, under Austrian influence until 1515, when it fell to Venetian rule. Gradisca was separated from Gorizia in 1647 but were reunited in 1754 to form the Princely County of Gorizia and Gradisca.

With the 1797 Treaty of Campo Formio, Venetian domination came to an end and Friuli was ceded to the Habsburg Monarchy (formally part of the Austrian Empire from 1804); however, Austria was forced to cede it to the Napoleonic Kingdom of Italy in the 1805 Peace of Pressburg, along with the parts of the County of Gorizia and Gradisca west of the Isonzo (the boundary was formalized in the 1807 Treaty of Fontainebleau). Trieste and Gorizia were then also ceded to the Napoleonic Illyrian Provinces in the 1809 Treaty of Schönbrunn.