Killed by Meg

Beings killed by Meg.

Regular Angels

 * Hester - Stabbed through the back with an angel blade to protect Castiel.

Regular Demons

 * One of Crowley's demons - Stabbed with an angel blade outside of one of Lucifer's Crypts.
 * Rosco - Stabbed with the demon-killing knife on a roadside.
 * Rosco's Partner - Stabbed with the demon-killing knife on a roadside.

Leviathans

 * Three SucroCorp guards (permanently incapacitated) - Splashed with borax and decapitated outside of SucroCorp.

Hellhounds

 * Crowley's Hellhound Pack - Killed with an angel blade during the Raid on Crowley's Monster Prison.

Hunters

 * Caleb - Slit his throat while on the phone with John Winchester in order to get him to give up the Colt.
 * Jo Harvelle - Killed by a hellhound pack unleashed by Meg.
 * Jim Murphy - Slit his throat in retaliation for the Winchesters getting their hands on the Colt.
 * Steve Wandell - Slit his throat while possessing Sam Winchester as part of her revenge plan on the Winchesters.

Vessels

 * Hester's vessel - Killed by Meg along with Hester.
 * Meg Masters - Incurred fatal injuries while possessing her, resulting in Meg Masters' death once the demon was exorcised.

Regular Humans

 * Meredith Jane Allen - Killed by daevas controlled by Meg in order to lure John Winchester into a trap.
 * Numerous unnamed humans - In her time as a demon, Meg killed numerous innocent people.

Other

 * Rumsfeld (presumably) Meg presumably killed Bobby Singer's dog Rumsfeld during the Attack at Bobby's House.