Aeaces is the name of two individuals from ancient Greek history:
- Aeaces, the father of Syloson and Polycrates.
- Aeaces, the son of Syloson, and the grandson of the above Aeaces. He was tyrant of Samos, but was deprived of his tyranny by Aristagoras, when the Ionians revolted from the Persians in 500 BC. He then fled to the Persians, and induced the Samians to abandon the other Ionians in the sea-fight between the Persians and Ionians. After this battle, in which the latter were defeated, he was restored to the tyranny of Samos by the Persians in 494 BC.