Knockeyon (Irish: Cnoc Eóin) is a hill in County Westmeath, Ireland in the townland of Streamstown.

[citation needed] Annotated as 'Chapel' on the OS maps this structure is situated within a dense hazel and oak historic woodland.

OS 25-inch map as a small rectangular building aligned on a NW-SE axis standing at the intersection point of four woodland pathways.

Knockeyon and other surrounding hills support deciduous woodland which mostly consists of native species.

On occasions, the Common pochard (Aythya ferina) population, which is one of the largest in Ireland,[3] has exceeded the threshold for international importance.