In Croatia, region is elongated in a north-south along the Danube which is border river between Croatia and Serbia. On the north region bordering with Hungary and on west continues to Slavonia, Syrmia and Baranya and rest of Croatia. The region is extremely flat with an average altitude of 80–110 meters. Coendures of Croatian Podunavlje are approximately overlapping with the territory of pre-War territory of Yugoslav municipalities Beli Manastir, Osijek, Vinkovci and Vukovar. Those four municipalities had a territory of 3.436 kilometres and constituted 6,1% of territory of Socialist Republic of Croatia. In 1991 mentioned municipalities had 402.152 inhabitants living in 157 settlements and they constituted 8,4% of population of Croatia at the time. After the collapse of Yugoslavia, local government system in Croatia was significantly changed and today Croatian Podunavlje in widest sense can be described as a region that is overlapping with the territory of Vukovar-Syrmia and Osijek-Baranja counties. In this sense region include the gravitation regions of towns of Našice and Županja and is significantly bigger and cover the area of 6.597 kilometres or 11,7% of territory of Croatia with 348 settlements and 598.434 inhabitants in 1991 (12,5% of total population of Croatia at that time).