Gaius Cluilius was under Roman tradition, the last king of Alba Longa. He reigned in the 7th century BC, the time of the Roman king Tullus Hostilius. His predecessor and the duration of his reign are unknown.
After several border incidents led to the war between Rome and Alba Longa. Gaius Cluilius fell with his troops into Roman territory and struck out five miles from Rome on a bearing that he had to ditch allegedly referred to him as Cluilia fossa. He died suddenly, before it came to battle. After his death, the Albanians Mettius Fufetius elected dictator.
- Livy, Ab urbe condita 1:22-23
- Dionysius of Halicarnassus, Rhomaike Archaiologia 3:2-5