Bird's eye view of Carrick Fergus Hall in 16th century Ireland. Carrickfergus (from the Irish: Carraig Fhearghais meaning "Rock of Fergus") is a large town in County Antrim, Northern Ireland. It had a population of 27,201 people in the 2001 Census. The town is the administrative centre for Carrickfergus Borough Council. It is Co. Antrim's oldest town and takes its name from Fergus M鏎 mac Eirc, the 6th century king of D嫮 Riata. 固opFoto