Viliami Manuopangai Hingano became the Minister for Agriculture, Food and Forestry when the new government came to power at the end of last year.
In a statement the Prime Minister's Office said it is with profound sadness that they announce Mr Hingano's death.
The Prime Minister, Hu'akavameiliku Siaosi Sovaleni, extended his deepest sympathies and heartfelt condolences to the minister's family on behalf of the government.
He said the death is an immense loss to Tonga.
The death places the Tonga Government in a difficult position.