Tailte Éireann is the official agency for mapping services in Ireland. The Ordnance Survey Maps are under their remit. To view historical OSI maps, please see the GeoHive map viewer on their website www.tailte.ie or click on the following link:
https://www.arcgis.com/apps/webappviewer/index.html?id=3ae19cc156bf4706a929304bf8fcc4f6
The Local Studies Library holds a limited number of first, second and third editions of OSI maps in hard copy. You are welcome to visit the library to view these maps, but due to copyright it is not possible to make copies.
We also have a collection of 19th century town maps of Mallow, Passage West, Queenstown (Cobh) and Youghal, County Cork. These maps are at a scale of ten feet to one mile, showing great detail in these towns. To view these maps, please click on the link below.
See more at the digital archive