Mirs Bay (also known as Tai Pang Wan, Dapeng Wan, Dapeng Bay) (Chinese: 大鵬灣) is a bay in the northeast of Kat O and Sai Kung Peninsula of Hong Kong, China. The north and east shores are surrounded by Yantian and Dapeng New District of Shenzhen. Ping Chau stands in the midst of the bay.
Mirs Bay along with other waterways near Hong Kong once was home to various coastal defence forts (e.g. Dapeng Fortress) used against pirates during the Ming Dynasty.
Mirs Bay was used by then American Commodore (later Admiral) George Washington Dewey during the Spanish American War as refuge and repair facility for the US Navy.
Within the bay are smaller harbours or inlets on the Hong Kong side:
The bay includes a number of islands, with an extensive group lying in the northwestern part of the bay, including:
To the south of Mirs Bay water flows out to the South China Sea.
Coordinates: 22°34′N 114°22′E / 22.567°N 114.367°E