Hotar, Hotaru or Hotarul may refer to the following rivers in Romania:
Hotar River (Sulța), tributary of the Sulța (Trotuș basin) in Bacău County Hotaru, tributary of the Crizbav (Olt basin) in Brașov County Hotaru, tributary of the Bozom (Olt basin) in Brașov County Hotaru River (Slănic), tributary of the Slănic (Buzău basin) in Buzău County Hotar, tributary of the Botul (Mureș basin) in Harghita County Hotaru, tributary of the Olt near Maieruș, Brașov County Hotarul, a tributary of the Olt near Olteț, Brașov County Hotarul, tributary of the Cormoș (Olt basin) in Covasna County
See also Izvorul cu Hotar River (disambiguation)