The UN figures issued today gave a total of 759 people killed in December alone, including 661 civilians and 98 members of the security forces.
The UN's monthly figures for both civilians and security forces over the year totaled 8,868.
Violence in Iraq surged in April after the Shiite-led government staged a deadly crackdown on a Sunni protest camp.
Iraq's al-Qaida branch has capitalised on the soaring sectarian tensions and on the civil war in neighbouring Syria to rebuild itself.