Gonbad-e Qabus Tower is a monument in Gonbad-e Qabus, Iran, and a UNESCO World Heritage Site. It marks the grave of Ziyarid ruler Qabus, and was built during his lifetime in 1006-1007. It is a cylindrical tomb tower that reaches 61 metres and can be seen from some 30 kilometres away. The eponymous city is named after the monument.

Considered to be a masterpiece of Iranian architecture, according to Oleg Grabar it achieves an "almost perfect balance between a purpose (princely glory beyond death), a form (cylindrical tower transformed into a star), and a single material (brick)". Gonbad-e Qabus Tower is the best known tower tomb in northern Iran.