| Marudu Bay | |
|---|---|
| Malay: Teluk Marudu | |
 Marudu Bay, seen from the east side at Kg. Mempakad. | |
  Marudu Bay Location within Malaysia  Marudu Bay Marudu Bay (Malaysia) | |
| Location | Kudat Division, Sabah, Malaysia |
| Coordinates | 6°58′0″N 116°56′0″E / 6.96667°N 116.93333°E |
| Type | Bay |
| Part of | Sulu Sea |
| River sources | Sungai Bandau (Marudu River), Sungai Bintasan, Sungai Telaga, Sungai Taka, Sungai Taritipan, Sungai Tuaran, Sungai Kinarom |
| Max. length | 60 kilometres (37 mi) |
| Max. width | 15 kilometres (9.3 mi) |
| Surface area | 1,000 square kilometres (390 sq mi) |
| Average depth | 33 metres (108 ft) |
| Settlements | Kudat, Kota Marudu |
Marudu Bay (Malay: Teluk Marudu) is a large bay on the north coast of the island of Borneo. It is located in the state of Sabah, Malaysia and opens to the Sulu Sea. Administratively, it is a part of Kudat Division. Kota Marudu District is on the south side of the bay, Kudat District on the west and Pitas District on the east side.