Wan Hai Lines, Ltd. (Chinese: 萬海航運股份有限公司; pinyin: Wàn Hǎi Hángyùn Gǔfèn Yǒuxiàn Gōngsī) is a Taiwanese shipping company founded in 1965.

Since then, it has become one of the largest companies in the container shipping industry, with a fleet of 142 vessels and a carrying capacity of 430,854 TEUs as of January 2023.

[1] In Wan Hai's early days, most of its business was shipping lumber between Taiwan, Japan, and Southeast Asia.

Wan Hai eventually expanded its Asia shipping network to services to Canada, U.S., South America, Africa, and Middle East.

In August 2017, a new weekly service to Cambodia from Taiwan was added, also regularly calling China and Thailand for loading and discharging cargo.