K.N. Onisillos is a Cypriot football club, based in Sotira, Ammochostos province. The club was founded in 1978, when Kentron Neon Sotira merged with an earlier club also named Onisillos. The name is inspired by an ancient King of Salamis, Cyprus.
Onisillos currently play in the Cypriot Second Division. Their greatest achievement came in 2003 when they were promoted into the Cypriot First Division. They were promptly relegated back to the Second Division the following year.
- Colours: Green
- Stadium: Community Stadium of Sotira
- President: Yiannos Ioannou