Camp Blood Bodycount

Across the Camp Blood series, the multiple psychos who have taken up the killer clown mantle have racked up quite a bodycount.

Camp Blood
The total bodycount for the first film is 9. Only two characters, Nicole and Bromley Thatcher were not killed by Harris. Nicole was accidentally stabbed by Jay and Bromley was hacked to death by Tricia in an act of self defense. This brings Harris's total known killcount to 7.
 * 1) Victor Cunningham - Harris, disguised as the killer clown, stabbed Vic through the stomach with a machete.
 * 2) George Guffy - Harris, disguised as the killer clown, decapitated George with one blow from a machete.
 * 3) Gus Franko - Harris killed Gus after she killed George.
 * 4) Sally Brennan - Harris, disguised as the killer clown, slashed Sally with a machete. George then discovered her, still alive, lying in the river. Harris presumably killed her afterwards.
 * 5) Steven Jessup - Harris, disguised as the killer clown, stabbed Steve in the arm with a machete before pulling the blade out and then slicing him through the head.
 * 6) Nicole Starrit - Jay, who was in a daze, thought he saw the clown coming towards him and stabbed the figure in the chest, only to find that he had fatally stabbed Nicole.
 * 7) Jason Helman - Harris, disguised as the killer clown, approached Jay, who was laughing maniacally, and then snapped his neck.
 * 8) Bromley Thatcher - Tricia sliced open Bromley's stomach with a machete and then hacked him to death.
 * 9) Nathan Cobb (Flashback) - Harris, disguised as the killer clown, marched Mary Lou and her lover into the woods and cut his neck open with a machete.
 * 10) Mary Lou Maloney (Flashback) - Harris, disguised as the killer clown, marched Mary Lou and her lover into the woods and killed her with a machete.

Additionally, Harris initially fakes her death when the group hears her screaming during the night and then finds a burnt corpse on the campfire. Whether or not Harris killed someone else and burned the body or the body was a fake is unclear. Later, Harris was twice run down by Tricia but the clown popped up in the backseat as she drove away and began to strangle her. However, Tricia reappeared in the second film but Harris appears to be dead, so the events that ultimately transpired are unclear.

It is possible that Harris somehow did manage to get into the car and began to strangle Tricia, but Tricia then crashed the car and survived while Harris perished. However, this is entirely speculation.