Please read all of the Supporting Deaths. You don't hear as much about them and I find them very interesting. definately read the last one. It is in the movie, most people don't recognize the actory though. He deserves his moment and will be missed, as will all of these characters.
Main Characters:
Dobby the house elf - Stabbed by Bellatrix Lestrange whilst disapparating
George Weasley - Killed by an explosion possibly caused by Augusus Rookwood
Hedwig - Killed by an unnamed Death Eater's killing curse while attempting to protect Harry
Mad-Eye Moody - Killed by Voldemort's killing curse when Mundungus Fletcher fled
Peter Pettigrew - Indirectly killed by Voldemort when the silver hand given to him strangles him in payment for his life debt to Harry Potter
Remus Lupin - Killed by Antonin Dolohov who should have been killed in that friggin diner!
Nymphadora Lupin, formerly Tonks - Killed by Bellatrix Lestrange who should have been killed in the ministry of magic in the third movie
Severus Snape - Killed by Nagini's poison when Voldemort wants the Elder Wand and believes it is loyal to Snape, when it is really loyal to Draco Malfoy
Nagini - Killed by Neville Longbottom when he cut off her head with the sword of Gryffindor
Bellatrix Lestrange - Killed by Molly Weasley when she threatens Ginny's life. She is hit with her killing curse promptly after Molly's famous line of "Not my daughter, you bitch!"
Lord Voldemort - Killed by Harry Potter's killing curse as the final move to end the series and making it AWESOME!!!
Supporting Characters:
Cadmus Peverell - Slit his own throat after bringing the girl he loved back from the dead. Original owner of the resurection stone
Antioch Peverell - Killed when someone slit his throat for his wand. Original owner of the Elder Wand
Ignotus Peverell - Not necessarily killed, but moved on to the next life. Many greats grandfather of Harry Potter and original owner of the only true Invisibility Cloak
The Grey Lady - Stabbed by her lover, the Bloody Baren
The Bloody Baren - Stabbed himself after killing The Grey Lady
Percival Dumbledore - Ariana, Aberforth, and Albus' father killed in Azkaban for murdering 3 muggles
Kendra Dumbledore - Ariana, Aberforth, and Albus mother killed when Ariana's magic went out of control
Ariana Dumbledore - sister to Aberforth and Albus Dumbledore. Killed when a three way duel broke out between her brothers and Gellert Grindelwald
Regulus Black - Drowned by inferi while attempting to destroy Voldemort's locket
Charity Burbage - Hit by Voldemort's killing curse
Rufus Scrimgeour - most likely killed by a killing curse cast by Pius Thicknesse
Unnamed German woman and her two kids, Geller Grindelwald, and Gregorovich - Killed by Voldemort's killing curse
Bathilda Bagshot - most likely killed by Nagini
Ted Tonks, Dirk Cresswell, and Gornuk - Killed by snatchers
Vincent Crabbe - Killed by his own Fiendfyre curse
Colin Creevey - Killed by Fenrir Greyback in the final battle of Hogwarts
Main Characters:
Dobby the house elf - Stabbed by Bellatrix Lestrange whilst disapparating
George Weasley - Killed by an explosion possibly caused by Augusus Rookwood
Hedwig - Killed by an unnamed Death Eater's killing curse while attempting to protect Harry
Mad-Eye Moody - Killed by Voldemort's killing curse when Mundungus Fletcher fled
Peter Pettigrew - Indirectly killed by Voldemort when the silver hand given to him strangles him in payment for his life debt to Harry Potter
Remus Lupin - Killed by Antonin Dolohov who should have been killed in that friggin diner!
Nymphadora Lupin, formerly Tonks - Killed by Bellatrix Lestrange who should have been killed in the ministry of magic in the third movie
Severus Snape - Killed by Nagini's poison when Voldemort wants the Elder Wand and believes it is loyal to Snape, when it is really loyal to Draco Malfoy
Nagini - Killed by Neville Longbottom when he cut off her head with the sword of Gryffindor
Bellatrix Lestrange - Killed by Molly Weasley when she threatens Ginny's life. She is hit with her killing curse promptly after Molly's famous line of "Not my daughter, you bitch!"
Lord Voldemort - Killed by Harry Potter's killing curse as the final move to end the series and making it AWESOME!!!
Supporting Characters:
Cadmus Peverell - Slit his own throat after bringing the girl he loved back from the dead. Original owner of the resurection stone
Antioch Peverell - Killed when someone slit his throat for his wand. Original owner of the Elder Wand
Ignotus Peverell - Not necessarily killed, but moved on to the next life. Many greats grandfather of Harry Potter and original owner of the only true Invisibility Cloak
The Grey Lady - Stabbed by her lover, the Bloody Baren
The Bloody Baren - Stabbed himself after killing The Grey Lady
Percival Dumbledore - Ariana, Aberforth, and Albus' father killed in Azkaban for murdering 3 muggles
Kendra Dumbledore - Ariana, Aberforth, and Albus mother killed when Ariana's magic went out of control
Ariana Dumbledore - sister to Aberforth and Albus Dumbledore. Killed when a three way duel broke out between her brothers and Gellert Grindelwald
Regulus Black - Drowned by inferi while attempting to destroy Voldemort's locket
Charity Burbage - Hit by Voldemort's killing curse
Rufus Scrimgeour - most likely killed by a killing curse cast by Pius Thicknesse
Unnamed German woman and her two kids, Geller Grindelwald, and Gregorovich - Killed by Voldemort's killing curse
Bathilda Bagshot - most likely killed by Nagini
Ted Tonks, Dirk Cresswell, and Gornuk - Killed by snatchers
Vincent Crabbe - Killed by his own Fiendfyre curse
Colin Creevey - Killed by Fenrir Greyback in the final battle of Hogwarts