2015 in Tonga

The following lists events that happened during 2015 in Tonga.

Incumbents

 * Monarch: Tupou VI
 * Prime Minister: ʻAkilisi Pōhiva

January

 * January 12 - The eruption of the Hunga Tonga volcano disrupts flights to and from Tonga.
 * January 16 - The explosion of the Hunga Tonga submerged volcano near Tonga creates a new island.