Kočani valley (Macedonian: Кочанска котлина, Kočanska kotlina) is located along the river of Bregalnica in eastern part of the Republic of Macedonia, at the latitude of 41° and 55' and longitude 22° and 25'. It covers an area of 1020 km² and extends from both sides of Bregalnica, from west-southwest to east-northeast, with the length of 26 km. Bottom of the valley, i.e. its flat portion covers an area of 115 km². The lowest point is in the western part, where Zletovska River flows into Bregalnica, which has an altitude of 290 meters. Going east, the plane is gradually rising up to 330 meters. The difference from the lowest to the highest part of the plane is 40 meters.
For certain parts of the valley there are specific names. Thus, the middle part is known as Fields of Kočani (or Kočansko), the southeast part as Viničko, and the west as Zletovsko. The territory around the major villages is named as: Orizarsko, Istibanjsko, Zrnovsko, Obleshevsko and others.
The valley has fertile soil and convenience with the available hydrographic network allows natural movement of water which is ideal for cereals, especially rice, to exist in the excellent natural conditions.
According to previous tests, come up to scientific findings that the valley emerged by tectonic influences. Crucial importance for today's form and relief structure had tectonic movements that occurred before the middle of Oligocene. At that period the ground came down between two splitting lines, one from the north (Osogovo) and another from the south (Plačkovica). In late Miocene and early Pliocene, the valley was flooded by freshwater lake, which along with other neighboring lakes created the Middle Vardar's Lake. The depth of this pliocene lake was over 500 meters.
The annual air temperature at average is 13°C, which ranks this valley among warm valleys in the country. It is similar to the air temperature at Veles or Strumica valley. Kočani valley is rich in thermal springs, especially in the villages of Istibanja, Dolni Podlog, Banja and Krupište. In the village of Dolni Podlog, near Kočani, two drillings of 35 meters and 460 meters are made, with 300 liter/sec. and temperatures between 70-80°C. Medicinal properties of the thermal water from Kočani valley, according to Risto Chanev, are identical with the water in the baths of Negorci, near Gevgelija.
- Kočani and the region from prehistory to the present days, Kočani Municipality, December 2003
- Kocani Geothermal District Heating System