The Kingdom of the Two Sicilies (Neapolitan: Regno d"e Ddoje Sicilie, Sicilian: Regnu dî Dui Sicili, Italian: Regno delle Due Sicilie) was the largest of the states of Italy before the Italian unification. It was formed as a union of the Kingdom of Sicily and the Kingdom of Naples, which collectively had long been called the "Two Sicilies" (Utraque Sicilia, literally "both Sicilies").
The Kingdom of the Two Sicilies lasted from 1815 until 1860, when it was annexed by the Kingdom of Sardinia to form the Kingdom of Italy in 1861. The capitals of the Two Sicilies were in Naples and in Palermo. The kingdom extended over the Mezzogiorno (the southern part of mainland Italy) and the island of Sicily. Jordan Lancaster notes that the integration of the Kingdom of the Two Sicilies into the Kingdom of Italy changed the status of Naples forever: "Abject poverty meant that, throughout Naples and Southern Italy, thousands decided to leave in search of a better future." Many went to the United States, Australia and Argentina. The kingdom was heavily agricultural, like the other Italian states; the church owned 50–65% of the land by 1750.