Regional decentralization entity of Trieste
Piazza Vittorio Veneto in Trieste, housing the provincial seat in the palace at left
Piazza Vittorio Veneto in Trieste, housing the provincial seat in the palace at left
Coat of arms of Regional decentralization entity of Trieste
Map highlighting the location of the province of Trieste in Italy
Map highlighting the location of the province of Trieste in Italy
Country Italy
RegionFriuli-Venezia Giulia
Disestablished30 September 2017
 • PresidentPaolo Viola
 • Total212 km2 (82 sq mi)
 (30 June 2016)
 • Total234,668
 • Density1,100/km2 (2,900/sq mi)
 • Total€7.886 billion (2015)
 • Per capita€33,490 (2015)
Time zoneUTC+1 (CET)
 • Summer (DST)UTC+2 (CEST)
Postal code
34121-34151 (Trieste); 34010-34018 (surroundings)
Telephone prefix040
ISO 3166 codeIT-TS
Vehicle registrationTS
Map of the province of Trieste

The province of Trieste (Italian: provincia di Trieste)[2] 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 (as of June 2016). 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 (Italian: ente di decentramento regionale di Trieste; Slovene: enota deželne decentralizacije Trst; Friulian: ent di decentrament regjonâl di Triest), and was reactivated on 1 July 2020.[3]

The province contains 6 comuni (sg.: comune).


Early history

After the dissolution of the Western Roman Empire, the area of the province of Trieste was ruled by the Ostrogoths, Eastern Romans (Byzantines), Lombards and by the Franks. With the advent of the Habsburgs (13th century) the territory was divided between the lords of Duino, Trieste, San Dorligo della Valle and Muggia. During the reign of Maria Theresa of Austria and, subsequently, Joseph II, the maritime trades were increased with institution of the free port.

In 1809, the area was ceded to France after the defeat of Austria in that year. After the French definitive defeat, the communes of Duino, Aurisina, Sgonico and Monrupino, which used to be part of Carniola, were annexed to that of Gorizia and Gradisca, while Trieste became a direct city of the Austrian Empire. San Dorligo della Valle and Muggia became part of Istria.

World War I left the territory of the province almost untouched, although fierce battles were fought just on its north-westernmost edges.

The whole area was occupied by Italy in November 1918, in the aftermath of Austria's defeat in World War I. It was officially annexed to Italy with the treaty of Rapallo of 1920, which also assigned all of the former Austrian Littoral to Italy.


Main article: Julian March

The Province of Trieste was first established in 1920. It comprised the territory of the province at the time of its abolition, as well as significant portions of the Karst Plateau and the region of Inner Carniola in present-day Slovenia. Between 1923 and 1943, the province of Trieste included also the communes of Monfalcone, Staranzano, Ronchi dei Legionari, San Canzian d'Isonzo, Turriaco, San Pier d'Isonzo, Fogliano Redipuglia and Grado (today in province of Gorizia), the current Slovenian municipalities of Sežana (including former communes of Dutovlje, Tomaj and Lokev), Divača (including former communes of Senožeče and Vremski Britof), Postojna (shortly Postumia before 1945; including former communes of Bukovje, Hrenovice and Slavina) and Pivka (including former communes of Šmihel and Košana), as well as some settlements in the present-day Slovenian municipality of Koper, namely Hrvatini, Elerji, Spodnje Škofije, Plavje and Osp.

After World War II

Main article: Treaty of Osimo

After the end of World War II, the Free Territory of Trieste was established as a free state on 15 September 1947. On 26 October 1954, Italy and Yugoslavia came to an understanding whereby the territory de facto was divided between the two states. Zone A of the free state became the new Province of Trieste and Zone B was to be administered by Yugoslavia. The Province of Trieste formally became a part of Italy on 11 October 1977, by the Treaty of Osimo.

The province was abolished on 30 September 2017.[4] Two years later, it was restored in the form of a regional decentralization entity.[3]


Italian is spoken within the whole province. In the city of Trieste, many people speak Triestine, a dialect of Venetian. Tergestine, an archaic dialect of Friulian, was spoken in Trieste and in Muggia, but became completely extinct by the mid-19th century.

An estimated 8% of the province's population (25,000 out of 260,000 from the last 1971 census) belongs to the Slovene ethnic community. Italian legislation recognizes and protects the Slovene linguistic minority in all six municipalities of the province, although visual bilingualism is not applied in the city centre of Trieste and in the town of Muggia.[5] In addition to standard Slovene, which is taught in Slovene-language schools, three different Slovene dialects are spoken in the Province of Trieste. The Karst dialect is spoken in the municipalities of Duino-Aurisina and Sgonico, as well as in several settlements in the municipality of Trieste: Barcola, Prosecco, and Contovello. The Inner Carniolan dialect is spoken in the municipality of Monrupino and in several settlements of the municipality of Trieste, namely Opicina, Trebiciano, Padriciano, and Basovizza. The Istrian dialect is spoken in the municipalities of San Dorligo della Valle and in the rural areas of Muggia, as well as in the southern suburbs of Trieste (most notably in Servola).


The following is a list of the six municipalities (comuni) of the province of Trieste. The capital of the province is in bold.

ISTAT Code Municipality Name Area (km2) Population
in Italian in Slovenian
032001 Duino-Aurisina Devin-Nabrežina 45 8,480
032002 Monrupino Repentabor 12.7 883
032003 Muggia Milje 13 13,111
032004 San Dorligo della Valle Dolina 24.5 5,754
032005 Sgonico Zgonik 31.3 2,072
032006 Trieste Trst 84.49 204,338
Total 212 234,638

Points of interest

See also


  1. ^ Regions and Cities > Regional Statistics > Regional Economy > Regional Gross Domestic Product (Small regions TL3), OECD.Stats. Accessed on 16 November 2018.
  2. ^ Slovene: Tržaška pokrajina; Friulian: provincie di Triest; Venetian: provincia de Trieste
  3. ^ a b "Focus sugli Enti di decentramento regionale". (in Italian). 22 September 2020. Retrieved 18 August 2023.
  4. ^ "Soppressione delle province del Friuli-Venezia Giulia". Autonomous Region of Friuli-Venezia Giulia. 2016-12-14. Archived from the original on 2018-01-12. Retrieved 2018-05-21.
  5. ^ Decreto del Presidente della Repubblica 12 settembre 2007 Archived 2011-11-11 at the Wayback Machine

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