Order of Service (Persian: نشان خدمت) is an Iranian state general order.

For the first time, it was established and awarded during the Pahlavi dynasty and during the reign of Reza Shah.

After Iranian Revolution it was re-established by "Council of Iran Ministers" in November 21, 1990.

The order has three classes.

According to Article 12 of the Regulations on the Awarding of Government Orders of Iran, the Order of Service awarded by President of Iran to recognize "achieving distinguished success" in one of the following:[1][2][3][4] It comes in three classes: