The UN report issued today said violence killed 856 civilians and 417 members of Iraq's security forces. It said attacks wounded 2,010 Iraqis.
The worst-hit city was Baghdad, with 379 civilians killed.
The UN says the figures do not take into account causalities in Anbar province nor some other militant-held parts of Iraq.
The October count apparently did not include the victims of the recent mass killings conducted by Islamic State group militants in Anbar province against pro-government Sunni tribesmen.
