Toivo Harald "Kirves" Koljonen (12 December 1910[1] – 21 October 1943) was a Finnish mass murderer and the last Finn executed for a civilian crime.

On 17 March 1943, he found a nearby farmhouse where five family members lived – a mother, two grandparents, and two children.

Two additional family members, the father and the eldest son, had been conscripted into the army and, consequently, were not present at the time.

Koljonen first hid in the stable, where he killed the daughter of the family with an axe (kirves in Finnish, which became his nickname).

Koljonen remains one of the worst axe murderers in Finnish history, along with Karl Malmelin.