The BarcÃÂu or Bereteu (Romanian or Berettyó in Hungarian) is a river which has its origin in SÃÂlaj County, Romania. It is about long with a watershed area of . After crossing Bihor County in Romania and Hajdú-Bihar and Békés County in Hungary, it flows into the Sebes-Körös (Romanian: CriÃÂul Repede) near Szeghalom. Its length in Romania is .
The upper reach of the BarcÃÂu, upstream of the junction with the RÃÂchita is locally called the ÃÂtei, Berchesei or BÃÂrcaÃÂu. The reach between the junctions with the RÃÂchita and the TopliÃÂa is locally known as the Tusa. The name BarcÃÂu is only used following its confluence with the TopliÃÂa.
The following towns and villages are situated along the river BarcÃÂu, from source to mouth: in Romania: ValcÃÂu de Jos, BoghiÃÂ, NuÃÂfalÃÂu, Ip, Suplacu de BarcÃÂu, Balc, Abram, Marghita, AbrÃÂmuÃÂ, ChiÃÂlaz, SÃÂlard, TÃÂmÃÂÃÂeu, in Hungary Kismarja, Pocsaj, Gáborján, Berettyóújfalu, Szeghalom.
The following rivers are tributaries to the river BarcÃÂu (from source to mouth):