Baja is a district in south-western part of Bács-Kiskun County. Baja is also the name of the town where the district seat is found. The district is located in the Southern Great Plain Statistical Region.

Bács-Kiskun is a county 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 km2, 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.