Leonidas II ("Lion's son", "Lion-like"), is Agiad King of Sparta from 254 to 235 BCE.

He is raised at the Persian Court, and according to Plutarch's Life of Agis IV, he marries a Persian woman.

According to other sources, this non-Spartan wife is actually a Seleucid, possibly the daughter of Seleucus I Nicator by his Persian wife Apama.

She is therefore not fully Persian, but half-Macedonian and half-Persian.

His Persian-influenced lifestyle, his non-Spartan (therefore foreign) wife and his half-Spartan children aer all made issues by the ephor Lysander, the co-king Agis IV and their supporters.

Leonidas II opposes the attempted reforms of his Eurypontid co-regent, Agis IV.

The ephor, Lysander, claims to have seen a sign from the gods against Leonidas, and Leonidas flees to avoid his trial.

In his absence, Leonidas is deposed from the throne and replaced by his son-in-law, Cleombrotus II.