Demographic history of Syrmia
This is demographic history of Syrmia. Prehistory. Between 3000 BC and 2400 BC, Syrmia was a core area of Indo-European Vučedol culture. 6th-7th century. In 6th-7th century, entire Syrmia region was populated by Slavs. According to other source, it was also populated by Gepids, and Avars. 11th-12th century. In 11th-12th century, according to Hungarian sources, region of Syrmia had partially Slavic and partially mixed Slavic-Hungarian population. Around 1154, Al-Idrisi, a Muslim geographer, described Manđelos as a rich town, whose inhabitants pursued a rather "nomadic way of life". By some opinions, Idrisi might have  referred simply to stock-breeding that played an important role among the Hungarian inhabitants of the entire region of Syrmia This fact was confirmed later by several Byzantine authors in the 12th century (Ioannes Kinnamos, Niketas Choniates, Patriarch Michael). 1437. In 1437, the largest part of Syrmia was populated by Serbs according to Serbian scholars. According to other sources Hungarians and Serbs lived mixed in this area in 1437. 1495. In 1495, the area of Syrmia had a mixed population of Croats, Hungarians and Serbs. 1857. According to the census from 1857, 59.4% of population of the part of Syrmia  under civil administration and 63.2% of population of the part of Syrmia under military administration (Petrovaradin regiment) were ethnic Serbs. The second largest ethnic group were Croats, while other ethnic groups were Germans, Hungarians, etc. 1910. According to the census from 1910, the population of the Syrmia region (Syrmia county) numbered 414,234 inhabitants, including: 1931. In 1931, the population of Syrmia included: 1971. In 1971, the population of the Serbian part of Syrmia (excluding City of Belgrade's municipalities of Novi Beograd and Zemun which are geographically part of Syrmia) numbered 313,926 inhabitants, including: 2011. According to the 2011 census  in Serbia, the population of the Serbian part of Syrmia (excluding City of Belgrade's municipalities of Novi Beograd, Zemun and Surčin which are geographically part of Syrmia) numbered 370,114 people and is composed of: According to the 2011 census in Croatia, the population of the Croatian Vukovar-Srijem county, numbering 179,521, is composed of: