13 January – Iraqi forces fighting the Islamic State militants manage to seize full control of Mosul University which the army described as a significant victory.
February
14- 16 February – A series of bombs on 3 consecutive days kills at least 48 people and injures over 50, all targeting Shi'ite majority areas in Baghdad.
25 February – Saudi Arabia's foreign affairs minister Adel al-Jubeir visits Iraq, marking the highest such diplomatic visit between the two countries since 1990.
March
5 March – Iraqi forces launch a new offensive against IS forces in western Mosul.
6 March – The al-Hurriya bridge, one of 5 vital bridges in Mosul is captured by Iraqi forces, providing a foothold for the retaking of the city.
8 March – Iraqi forces manage to retake Badoush prison in western Mosul, the site of the Badoush prison massacre.
2 July – A suicide bomber targets a displacement camp in Anbar, killing 14 people.
10 July – Iraqi prime minister Al-Abadi announces victory over IS forces and reclaiming the city of Mosul after 9 months of intensive fighting.
August
15 August – Iraqi forces announce the beginning of combat operation against IS stronghold in Tal Afar.
31 August – The Iraqi government announces the retaking of Tal Afar and the entire Nineveh governorate from IS control.
September
14 September – At least 60 people are killed and dozens injured in two attacks in the Thi Qar province near Nasiriyah city. In the first attack unidentified gunmen opened fire in a restaurant on the highway. The next attack occurred shortly after, when a car exploded at a security checkpoint near the same area.
29 September – Iraqi government official threat to Kurdish to close a border in Northern Iraq follow vote for independence referendum.