Tullus Cloelius or Cluilius, called Cloelius Tullus in some sources, was a Roman envoy to Fidenae. He and his fellow envoys Gaius Fulcinius, Spurius Antius, and Lucius Roscius were dispatched in the year 438 B.C., tasked with investigating the reasons for Fidenae's alliance with Veii.
In 438 B.C., Tullus Cloelius or Cluilius, along with Gaius Fulcinius, Spurius Antius, and Lucius Roscius, were sent to Fidenae to understand the reasons behind their alliance with Veii.