Bahna may refer to:
Romania Bahna, a commune in Neamț County Bahna, a village in Pârgărești Commune, Bacău County Bahna, a village in Ilovița Commune, Mehedinți County Bahna, a tributary of the Buhai in Botoșani County Bahna, a tributary of the Ciunca in Iași County Bahna (Danube), a tributary of the Danube in Mehedinți County
Ukraine Bahna, Ukraine