Ronchi dei Legionari (Bisiacco: Ronchi; Friulian: Roncjis, Slovene: Ronke, German: Ronkis) is a comune (municipality) in the regional decentralization entity of Gorizia in Friuli-Venezia Giulia, northeast Italy, about 14 km (9 mi) southwest of Gorizia and 30 km (19 mi) northwest of Trieste.

Its current name is owed to the legionaries of Gabriele D'Annunzio, who set out from here on September 12, 1919 (the March of Ronchi), marking the beginning of the Fiume Expedition.

It owes its current name to the Legionaries of Gabriele D'Annunzio, who set out with deserters of the Royal Italian Army's 2nd Grenadiers Regiment I Battalion from the town on 12 September 1919 (the so-called March of Ronchi), to start the Enterprise of Fiume.

[5] The Ronchi dei Legionari weather station is located in the municipal area, officially recognized by the world meteorological organization.

Air Dolomiti's executive headquarters were formerly in Ronchi dei Legionari, while the airline's registered office was in Dossobuono, Villafranca di Verona.