|King of Sparta|
|Reign||c. 254 – 242 BC|
c. 241 – 235 BC
|Predecessor||Areus II, Cleombrotus II|
|Successor||Cleombrotus II, Cleomenes III|
Leonidas II was raised at the Seleucid court, and according to Plutarch's Life of Agis IV, he married a Persian woman. According to other sources, this non-Spartan wife was actually a Seleucid, possibly the daughter of Seleucus I Nicator by his Persian wife Apama. She was 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 would all be made issues by the ephor Lysander, the co-king Agis IV and their supporters.
Leonidas II opposed the attempted reforms of his Eurypontid co-king, Agis IV. The ephor, Lysander, claimed to have seen a sign from the gods against Leonidas, and Leonidas fled to avoid his trial. In his absence, Leonidas was deposed from the throne and replaced by his son-in-law, Cleombrotus II.
He later returned to Sparta while Agis was on campaign in Aetolia and deposed and exiled Cleombrotus II, and reclaimed his throne. Soon after, he deposed and executed Agis IV alongside his mother Agesistrate and grandmother Archidamia.
His son Cleomenes III eventually succeeded him, having been married at age 18 to Agiatis (d. 224 BC), widow of Agis IV, the Eurypontid king; they had at least one son together who died in Egypt with his grandmother. His daughter Chilonis was married to Cleombrotus II who replaced his father-in-law as king for some time. She was notable for her fidelity to her father, whom she followed into exile, and then to her husband whom she also followed into exile after her father returned to power.
- Cartledge, Hellenistic and Roman Sparta, p. 40.
- Christien, "Léonidas II", p. 244.
- Sarah B. Pomeroy Spartan Women p. 88-89. After her cousin fled into exile in Ptolemaic Egypt, Cratisiclea and his children were kept as hostages in Egypt by Ptolemy IV Philopator who ordered her death.
- Sarah B. Pomeroy Spartan Women p. 87. She may have been the daughter of Seleucus I Nicator, who lived several decades earlier; however, only two of his daughters are known by name.
- Sarah B. Pomeroy Spartan Women pages 87-88.
- Paul Cartledge & Antony Spawforth, Hellenistic and Roman Sparta, A tale of two cities, London and New York, Routledge, 2002 (originally published in 1989). ISBN 0-415-26277-1
- Jacqueline Christien, "Léonidas II. La royauté hellénistique à Sparte", Ktèma, 2015, n° 40, pp. 243–253.