Iraqi Dinar (IQD)
The official currency of Iraq is the Iraqi dinar (IQD) and has been used since 1932. Prior to 1932, Iraq used the Indian Rupee, from the British occupation of the country after World War I.
The notes used to have Saddam Hussein on them, however these have now since been replaced with inscriptions in both Arabic and Kurdish. They also show features of Iraq such as the Tigris and Euphrates rivers as well as the minaret of Samara. It's still possible to find some "Saddam notes" or "Saddam dollars" in some markets in Iraq, and even surrounding countries, such as Jordan, but they are purely for souvenir value now.
The Iraqi Dinar is one of the few currencies that can be split into 1000 Fils, as opposed to most currencies which are split into denominations of 100. However since the 1990s the Fils have become obsolete due to inflation. Omani Dinars are also split into 1000 Fils, and Omani Rials are split into 1000 Baisa. (Incidentally there are also 2 countries in the world - Mauritania and Madagascar - which are non-decimal and are split into 5 khoums and 5 iraimbilanja respectively.
Notes in circulation
Currently the notes in circulation are 250, 500, 1000, 5000, 10000, 25000 and the rare 50000.
Coins in circulation
There are currently 25, 50 and 100 IQD coins in circulation. These however are not much at all due to inflation, and are really only valuable as souvenirs.
As of 6 March 2023 the current exchange was roughly 1460 IQD to 1 USD. So you can see why the coins aren't bothered with much!