Rhosus may refer to:
Places and jurisdictions Arsuz (Arsûs), formerly known as Rhosus, a coastal town in Hatay Province, Asian Turkey, the former Diocese of Rhosus, with see in the above city in Cilicia Secunda, now a Latin Catholic titular see a place on the Pierian coast in Macedonia
Other uses (1986), a Moldovan-flagged cargo ship whose abandoned ammonium nitrate cargo fueled the 2020 Beirut explosion Rhosus (moth), a moth genus