Castlemahon is in the Electoral Division of Strangford, in Civil Parish of Ballyculter, in the Barony of Lecale Lower, in the County of Down

The Irish name for Castlemahon is Caiseal Mathúna

Castlemahon is on Castlemahon.


It is located at 54° 20' 43" N, 5° 36' 19" W.


Castlemahon has an area of:

Nationwide, it is the 19779th largest townland that we know about

Within Co. Down, it is the 745th largest townland


Castlemahon borders the following other townlands:


We don't know about any subtownlands in Castlemahon.

Genealogy / Ancestry / Records Search

Curious to see who lived in Castlemahon in the past? Maybe even seeing scans of their handwritten census returns?

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Castlemahon was added to OpenStreetMap on 18 Feb 2015 by Stephen_Co_Antrim.