The Barcău or Bereteu (Romanian or Berettyó in Hungarian) is a river which has its origin in Sălaj County, Romania.

[2] The upper reach of the Barcău, upstream of the junction with the Răchita is locally called the Ștei, Berchesei or Bărcașu.

[3][4] The following towns and villages are situated along the river Barcău, from source to mouth: in Romania: Valcău de Jos, Boghiș, Nușfalău, Ip, Suplacu de Barcău, Balc, Abram, Marghita, Abrămuț, Chișlaz, Sălard, Tămășeu, in Hungary Kismarja, Pocsaj, Gáborján, Berettyóújfalu, Szeghalom.

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