戈尔迪安三世（Marcus Antonius Gordianus Pius，225年1月20日－244年2月11日）是罗马帝国皇帝（238年至244年），在马克西米努斯死后，元老院推举戈尔迪安一世、戈尔迪安二世、普皮恩努斯与巴尔比努斯这四位皇帝皆先后死亡，于是年仅13岁的戈尔迪安三世继位，不过他也受到近卫军的控制。戈尔迪安三世后来在与波斯的作战中去世。

Gordian III (Latin:Marcus Antonius Gordianus Pius Augustus; 20 January 225 AD – 11 February 244 AD) was Roman Emperor from 238 AD to 244 AD. At the age of 13, he became the youngest sole legal Roman emperor throughout the existence of the united Roman Empire. Gordian was the son of Antonia Gordiana and an unnamed Roman Senator who died before 238. Antonia Gordiana was the daughter of Emperor Gordian I and younger sister of Emperor Gordian II. Very little is known on his early life before his acclamation. Gordian had assumed the name of his maternal grandfather in 238 AD.