I presume you mean the Republic of Ireland and not Southern Ireland. It's around 3.5 M.
As of 2021, the population of the Republic of Ireland, which includes Southern Ireland, is estimated to be around 5 million people.
4,422,100 people
The population of Ireland in 1942 was approximately 2.9 million.
The population of the whole of Ireland is approximately 6.9 million people. This includes both the Republic of Ireland, with a population of around 4.9 million, and Northern Ireland, with a population of around 1.8 million.
The population of Ireland in 1916 was approximately 4.4 million people.
As of the latest available data, the population of Kildare in Ireland is approximately 222,504.
As of 2016, the population of Kilkenny, Ireland was estimated to be around 26,512.
Eire - or southern Ireland. Although it's part of the British Isles (being 'attached' to Northern Ireland) it's separate from the United Kingdom.
Eire
Ireland is larger than Denmark.
Maurice Moynihan has written: 'The functions of the Department of the Taoiseach' -- subject(s): Ireland (Eire), Ireland (Eire). Dept. of the Taoiseach
Eire is the Irish name for Ireland. 5p refers to a 5 Pence coin.
Eire
An eleven letter word for Ireland is "Emerald Isle".
Rapt in Eire - 2009 is rated/received certificates of: Ireland:15
A four-letter synonym for Ireland is "Eire" - but this is not an abbreviation.
Ireland - including Northern Ireland and Eire.
The Irish for Ireland is Éire. It is believed it comes from the Goddess Ériu.
eire or the emerald isle