Medieval origins
Cill Fhéach — Fiach's Church
The village name preserves Saint Fiach, though the details are gone. Medieval churches were placed to serve surrounding communities. This one sat at the centre of farming land, likely a spiritual and social focal point long before the border existed. The name stayed when jurisdictions changed.
1925: Nearly transferred
The Boundary Commission's choice
When Ireland was partitioned, the Boundary Commission of 1925 considered moving Killea to Northern Ireland based on its Protestant-majority population at the time. The decision went to Donegal instead. The border stayed where it was. Daily life crossed it anyway.