The Diet of Dalmatia (Croatian: Dalmatinski sabor, Italian: Dieta della Dalmazia) was the regional assembly of the Kingdom of Dalmatia within the Austro-Hungarian Empire. It was founded in Zadar in 1861 and last convened in 1912, before being formally dissolved in 1918, with the demise of the Empire. Since the founding of the Dalmatian diet, the pro-Italian Autonomist Party held the parliamentary majority until 1870, when the (Croatian-Serbian) People's Party won the parliamentary election. Croatian then became the official language of the diet in 1883.