OCT Harbour (), formerly known as OCT Bay and Happy Harbour, is a large retail and entertainment complex in Shenzhen, China. It covers an area of roughly 1.25 km². and features amongst others, a manmade lake and canals, hotels and a shopping mall. It was opened to the public in 2011.

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Buildings and structures in Shenzhen Tourist attractions in Shenzhen Shopping malls in Shenzhen {{Shenzhen-stub