Küküllő County (; ; ) was a county of the Kingdom of Hungary. Located in the Transylvania region between the rivers Maros (Mureș) and Nagy-Küküllő (Târnava Mare), it existed from the 11th century until the 1876 Hungarian county reform, when its territory was divided over the new counties Kis-Küküllő and Udvarhely.Law XXXIII 1876 Its capital was Küküllővár (, ). "Küküllő vármegye" in the Magyar Katolikus Lexikon
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