The Hunger Games:
* Rue: A young tribute from District 11, Rue becomes Katniss's ally and is killed by Marvel, a tribute from District 1.
* Glimmer, Marvel, and the other tributes: All tributes die, except Katniss and Peeta.
* Clove: A tribute from District 2, Clove is killed by Katniss in a fight.
* Cato: The career tribute from District 2, Cato is killed by a pack of muttations.
* The Gamemakers: Many Gamemakers are killed when the muttations attack.
Catching Fire:
* Johanna Mason, Enobaria, and Beetee: These victors are captured by the Capitol during the Quarter Quell.
* Mags: A tribute from District 4, Mags sacrifices herself to save Katniss and Peeta during the Quell.
* Finnick Odair: A former victor, Finnick is killed during a fight with the Capitol forces in the final battle.
Mockingjay:
* Primrose Everdeen: Katniss's younger sister, Prim is killed by a Capitol bombing.
* President Snow: The ruthless President of Panem, Snow is killed by Katniss in a fit of rage.
* Coin: The leader of the rebellion, Coin is killed by Katniss, who discovers Coin's true intentions.
* The Capitol forces: Many Capitol forces are killed in the battles against the rebels.
Other deaths:
* The tributes from each district in the Hunger Games: The vast majority of tributes die in the Games.
* The Peacekeepers: Many Peacekeepers are killed during the rebellion.
* The Capitol citizens: Many Capitol citizens are killed during the rebellion.
It's worth noting that some characters' deaths are hinted at or implied, but not explicitly shown. Additionally, the trilogy contains numerous unnamed characters who also die.