The Iranian toman (Persian: تومان, romanized: tūmân, pronounced [tuː.mɒːn]; from Turko-Mongolian tümen "unit of ten thousand",[1][2][a] see the unit called tumen) is a superunit of the official currency of Iran, the rial.

During World War I, a group of German and Turkish soldiers occupied a small portion of Iran until 1918.

They circulated five different denominations of German Imperial Treasury notes (printed around 1905) with a red overprint in Persian that were used locally at the rate of 4 marks to 1 toman.

[17] Wilhelm Wassmuss appears to be given credit for the occupation and issue of currency.

[8] In July 2019, the Iranian government approved a bill to change the national currency from the rial to the toman with one new toman equalling 10,000 rials, a process that would reportedly cost $160 million.