Tooz District () is a district in the north-eastern part of Saladin Governorate, Iraq. Its towns include Tuz Khurmatu, Sulaiman Bek, and Amirli. Its population is mixed between Arabs, Kurds and Turkmen. The district's name is in the Turkmen dialect, meaning 'salt.'

There are areas that officially, according to the Federal government of Iraq, belong to Tooz District; but that they have been de facto under the jurisdiction and control of Sulaymaniyah Governorate (Kurdistan Region). These areas constitute Nawjul Subdistrict. Under jurisdiction of Sulaymaniyah Governorate (Kurdistan Region), this subdistrict has been incorporated to Kifri District (itself a disputed district, divided in two between Sulaymaniyah and Diyala).UNHCR (January 2024) International Protection Considerations with Regards to People Fleeing Iraq pg. 67: " For example, the administration of the disputed Nawjul Sub-District with its 46 villages is split between the KRG (which administers Kifri District) and the Federal Government (which administers Tuz Khurmato District)."

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