Waterford is in Ireland.
Waterford and Carlow are both in the Republic of Ireland, not Northern Ireland.
No. Kerry is in the Republic of Ireland which is not part of the UK. Only Northern Ireland is part of the UK and Kerry is not in Northern Ireland.
In Waterford in Ireland.
As far as I know, no. Waterford is a city & county in Ireland the island next to the UK. There may though be a small area or village etc in London called Waterford but I am not certain. There is also a Waterford in America. I was just on Google Maps and I found a Waterford Rd and Watford, are they what you mean?
No, it is in western Ireland which does not class as part of the UK.
Louth is the smallest County in Ireland so Waterford is bigger.
Ireland does not have postcodes. The postal address would be almost exactly as you wrote it, just with the addition of another Waterford, as Larchville is in the city of Waterford, which is in the county of Waterford: 127 Larchville Waterford County Waterford Ireland If you are filling in an internet form that is looking for a postcode, use IE.
Waterford, Ireland is 10,272 acres.
Galway and Waterford are important cities in Ireland, but there are bigger cities.
Six counties of Northern Ireland are part of the UK. The rest of the island of Ireland is the Republic of Ireland and an independent country.
County Waterford is the 21st largest county of Ireland's 32 counties.