Þistilfjörður (sometime anglicised as Thistilfjördur) is a bay in northeast Iceland, between the Rifstangi and Langanes peninsulas, near the town of Þórshöfn (Thorshofn). The name also refers to the region immediately to the southwest of the bay, roughly corresponding to Svalbarðshreppur municipality.

Þistilfjörður (sometime anglicised as Thistilfjördur) is a bay in northeast Iceland, between the Rifstangi and Langanes peninsulas, near the town of Þórshöfn (Thorshofn). The name also refers to the region immediately to the southwest of the bay, roughly corresponding to Svalbarðshreppur municipality.