A man in his 30s was assaulted by two men shortly before half seven on Saturday evening when he answered the door of a house in the Athlumney Castle estate.
Both men ran from the scene.
One of them was armed with a hurley and was wearing combat trousers.
The victim was taken by ambulance to Our Lady of Lourdes hospital in Drogheda with a head injury.
Anyone with information about the incident is being asked to contact the Detective Unit at Navan Garda Station on 046-9079930 or the Garda Confidential Line 1800 666111.