Cleomenes II (d.309 BC) was Agiad King of Sparta from 369 to 309 BC.

He was the 25th king of the Agid line and the son of Cleombrotus I. and the brother of Agesipolis II., whom he succeeded in 369 BC. He died in 209 BC, after a reign of sixty years; but during this long period we have no information about him of any importance. He had two sons, Acrotatus and Cleonymus. Acrotatus died during the life of Cleomenes, upon whose death Areus, the son of Acrotatus, succeeded to the throne. (Diod. xx. 29; Plut. Agis, 3; Paus. i. 13. § 3, iii. 6. § 1; Manso, Sparta, iii. 1, p. 164, 2. pp. 247, 248: Diod. xv. 60, contradicts himself about the time that Cleomenes reigned, and is evidently wrong; see Clinton, Fast. ii. pp. 213, 214.)

Succeeded by: Areus I