Madiun Regency is a landlocked Regency in East Java province, Indonesia. It covers an area of 1,010.86 km2, and had a population of 662,278 at the 2010 Census and 744,350 at the 2020 Census; the official estimate as of mid-2023 was 747,589. It is bordered by Bojonegoro Regency in the north, Nganjuk Regency in the east, Ponorogo Regency in the south, and Magetan Regency and Ngawi Regency in the west, while the independent city of Madiun is an enclave within the regency.