Lonja is a river in central

Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = " Lijepa naša domovino"("Our Beautiful Homeland") , image_map = , map_caption = , capi ...

, a left tributary of the

Sava The Sava (; , ; sr-cyr, Сава, hu, Száva) is a river in Central and Southeast Europe, a right-bank and the longest tributary of the Danube. It flows through Slovenia, Croatia and along its border with Bosnia and Herzegovina, and finally t ...

. It is long and its basin covers an area of . The Lonja rises in the Kalnik mountain in northern Croatia, southeast of

Novi Marof Novi may refer to the following : Places and jurisdictions Balkans * Novi Grad, Bosnia and Herzegovina * Novi Sad, a city in Serbia * the former Catholic Diocese of Novi, with see at Herceg-Novi (Castelnuovo), in Montenegro; now a Latin titu ...

, at . It flows westward until turning south near

Breznički Hum Breznički Hum is a village and municipality in Croatia in Varaždin County. According to the 2011 census, there are 1,356 inhabitants, absolute majority of whom are Croats The Croats (; hr, Hrvati ) are a South Slavic ethnic group who s ...

, passing east of

Sveti Ivan Zelina Sveti Ivan Zelina () is a cities of Croatia, town in Zagreb County, Croatia. Geography Sveti Ivan Zelina is north-east from Zagreb, connected: * by A4 (Croatia), A4 highway (Zagreb - Sv.Helena), then state road Sv.Helena - Sveti Ivan Zelina, Po ...

, and turning southeast near Sveta Helena. East of Lupoglav, it turns south again, passing through

Ivanić-Grad Ivanić-Grad or Ivanić Grad ( is a town in Zagreb County, Croatia. It is part of Moslavina. Geography Ivanić-Grad is located south-east from Zagreb, connected: * by highway A3 (Bregana-Zagreb-Ivanić-Grad-Slavonski Brod-Lipovac) * by train ...

and nearing the river

. It then flows in parallel to the Sava for the rest of its course, and the nature park Lonjsko polje, a protected area, covers the remainder of the Lonja river basin. Near the end of its course, the river splits into ''Stara Lonja'' ("Old Lonja") that enters Sava at the eponymous village of Lonja; and ''Trebeš'' or ''Trebež'' that discharges into Sava some 5.5 km downstream in the eponymous village of Trebež at . The main tributaries of the Lonja are: *

Česma Česma is a river in central Croatia, a left tributary of the river Lonja-Trebež. It is long, and its catchment area is . Created by merging streams ''Grđevica'' and ''Barna'' at near the village of Pavlovac in the municipality of Veliki ...

(Čazma) (106 km long), which joins Lonja northeast of

Sisak Sisak (; hu, Sziszek ; also known by other alternative names) is a city in central Croatia, spanning the confluence of the Kupa, Sava and Odra rivers, southeast of the Croatian capital Zagreb, and is usually considered to be where the Posavin ...

* Zelina, south of

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References

Rivers of Croatia {{Croatia-river-stub