Losaline Maʻasi is a Tongan politician, cabinet minister, and former member of the Legislative Assembly of Tonga for Tongatapu 5.

Maʻasi is a former chief executive of the Ministry of Agriculture.

On 26 June 2018 she was appointed Minister of Internal Affairs and Sports, replacing ʻAkosita Lavulavu.

[2] In January 2019 a minor cabinet reshuffle saw her swap her Internal Affairs portfolio for Agriculture, Food, and Forests.

She contested the 2021 Tongan general election, but was unsuccessful.