Sisak (pronounced [sǐːsak]; also known by other alternative names) is a city in central Croatia, spanning the confluence of the Kupa, Sava and Odra rivers, 57 km (35 mi) southeast of the Croatian capital Zagreb, and is usually considered to be where the Posavina (Sava basin) begins, with an elevation of 99 m. The city's total population in 2021 was 40,185 of which 27,886 live in the urban settlement (naselje).

Legend has it that they tied him to a millstone and threw him into a river, but he freed himself from the weight, escaped and continued to preach his faith.

The fortress is famous for the victory of the joint forces of Croats, Austrians and Carniolans (Slovenes) over the Ottomans in 1593, known as the Battle of Sisak.

[19] On 11 August 1594, Ottoman forces fled and set the fortress on fire after a powerful Habsburg-Croat army approached.

With the outbreak of the Croatian War of Independence in 1991, Sisak remained in Government hands while the territory to the south was controlled by rebelling Serbs.

[27] The town, located roughly 20 km (12 mi) northeast of the epicenter, reported damage to the hospital as well as city hall and various churches.

[30] In the 2011 census, of the total population of 47,768 there were 40,590 Croats (84.97%), 3,071 Serbs (6.43%), 1,646 Bosniaks (3.45%), 648 Romani (1.36%), 179 Albanians (0.37%), 29 Montenegrins (0.06%), and the rest were other ethnicities.

In the 2011 census, the population by religion was 37,319 Roman Catholics (78.13%; since 2009 again served by their own Diocese of Sisak), 3,279 Orthodox Christians (6.86%), 2,442 Muslims (5.11%) and others.

[33] Chief occupations are farming, ferrous metallurgy (iron works), chemicals, leather (footwear), textiles and food processing plants (dairy products, alcoholic beverages), building material, crude oil refinery and thermal power.

Sports and recreation facilities in the town and the surroundings include mainly the waters and alluvial plains a public beach on the Kupa.

Sisak is the starting point for sightseeing tours into Lonjsko Polje (Field of Lonja river) nature park.

[citation needed] Sisak is twinned with: Bjelovar, Bjelovar-BilogoraSlavonski Brod, Brod-PosavinaDubrovnik, Dubrovnik-NeretvaPazin, Istria Karlovac, KarlovacKoprivnica, Koprivnica-KriževciKrapina, Krapina-ZagorjeGospić, Lika-Senj Čakovec, MeđimurjeOsijek, Osijek-BaranjaPožega, Požega-SlavoniaRijeka, Primorje-Gorski Kotar Sisak, Sisak-MoslavinaSplit, Split-DalmatiaŠibenik, Šibenik-KninVaraždin, Varaždin Virovitica, Virovitica-PodravinaVukovar, Vukovar-SrijemZadar, ZadarZagreb, Zagreb