Manghai (simplified Chinese: 芒海镇; traditional Chinese: 芒海鎮; pinyin: Mánghǎi Zhèn) is a town in Mangshi, Yunnan, China.

As of the 2017 census it had a population of 6,777 and an area of 105-square-kilometre (41 sq mi).

[1][2] As of December 2015, the town is divided into 3 villages: The town has a subtropical climate with an annual rainfall of 1,650-millimetre (65 in), a long sunshine time and an annual average temperature of 19.5 °C (67.1 °F).

The economy is supported primarily by farming, ranching and frontier trade.

The traditional industries are rice, tea, sugarcane, animal husbandry and tsao-ko.