The Iraqi Health Ministry says that militants killed 325 Iraqis in July making it the bloodiest month in two years.
The figures showed 241 civilians, 44 soldiers, and 40 policemen were killed last month and almost 700 people were injured.
The worst day of violence was on July 23 when more than 100 people were killed in bomb and gun attacks across Iraq.
The coordinated violence against mostly Shi'ite Muslim targets was claimed by Al-Qaeda's affiliate in Iraq.
Al-Qaeda's Iraqi wing, the Islamic State of Iraq, warned last month that it planned to revitalize its campaign, weakened under assault from U.S. troops and Sunni militias in 2007.
Based on reporting by BBC and Reuters