Madiunalso spelled Madioen kotamadya kota (municipalitycity) and kabupaten (regency) in East Java (Jawa Timur) propinsi (or provinsi; province), Java, Indonesia. The city lies on the east bank of the Madiun River. The Its population is mostly Indonesian and Chinese. The city was the scene of a Javanese, with a large Madurese minority. A short-lived communist rebellion, the so-called Madiun Affair, took place just to the east of the city, in the village of Kresek, in 1948. The rebellion was just one of many uprisings in the revolution that followed Indonesia’s declaration of independence in 1945. A monument is maintained in Kresek that commemorates those who died in the village, and it maintains a site at which hundreds of soldiers killed in the Indonesian revolution are buriedboth during the Madiun Affair and in the course of the revolution as a whole. The city is served by a main railway, and roads and an air service connect it to other towns.

The regency incorporates has fertile plains in to the north and in the centre, high volcanic peaks (to the east—notably Mount Lawu , (10,712 feet [3,265 metres]) in —and to the east and west, and limestone ranges to the south. Rice and sugarcane are the main crops, followed by corn (maize), cassava, coffee, cacao, cinchona, coconuts, and peanuts (groundnuts); teak comes from the forests. Madiun, a residency under the Dutch, was reduced in area under the Indonesian republic and became a regency. Area regency, 318 374 square miles (824 969 square km); city 13 square miles (34 square km). Pop. (20052010) 171,390regency 662,278; city 170,964.