Bács-Kiskun (Hungarian: Bács-Kiskun vármegye, pronounced [ˈbaːt͡ʃ ˈkiʃkun]) is a county (vármegye in Hungarian) located in southern Hungary. It was created by the merger of the pre-World War II Bács-Bodrog and the southern parts of Pest-Pilis-Solt-Kiskun counties. With an area of 8,445 km, Bács-Kiskun is the largest county in the country, slightly larger than Cyprus. The terrain is mostly flat with slight emergences around Baja. The county seat and largest city of Bács-Kiskun is Kecskemét.
The county is also part of the Danube-Kris-Mures-Tisa euroregion.