What are the boundaries of Republic Ireland?

* East and South: Northern Ireland (part of the United Kingdom).

* West: The Atlantic Ocean.

* North: The Atlantic Ocean and Northern Ireland.

Maritime Boundaries:

* East: The Irish Sea and the North Channel.

* South: The Celtic Sea and the Atlantic Ocean.

* West: The Atlantic Ocean.

* North: The Atlantic Ocean and the North Channel.

The total length of the Republic of Ireland's coastline is approximately 3,170 kilometers (1,970 miles).