Nganjuk Regency is a regency of East Java Province, Indonesia. It borders Bojonegoro Regency in the north, Jombang Regency in the east, Kediri Regency in the south and Madiun Regency in the west. It covers an area of 1,224.33 sq. km, and had a population of 1,017,030 at the 2010 Census and 1,103,902 at the 2020 Census; the official estimate as of mid-2023 was 1,144,508. The administrative centre of the regency is the town of Nganjuk. The current regent is Dr. Drs. H.