The Irish population declined throughout the 1950s and early 1960s before beginning to increase in the late 1960s.
This growth continued throughout the 1970s with almost 400,000 added to the population between 1971 and 1979.
The 1980s saw a return to slower growth as a result of migration with the population actually falling during the 1986-1991.
Since then it has grown in each decade - the current population is almost 70 per cent bigger than it was in 1961.
Scroll down to see how Ireland's population has changed over the last 60 years
In total the population of Ireland has increased by almost 1.9million over the past 60 years.
The number of people living in the Republic of Ireland has risen from 2,898,264 in 1956 and now stands at 4,761,865, according to figures released by the Irish Central Statistics Office.
Population change is driven by births, deaths and net migration (immigration less emigration).
How many people live in Ireland?
1956 - 2,898,264
1961 - 2,818,341
1966 - 2,884,002
1971 - 2,978,248
1979 - 3,368,217
1981 - 3,443,405
1986 - 3,540,643
1991 - 3,525,719
1996 - 3,626,087
2002 - 3,917,203
2006 - 4,239,848
2011 - 4,588,252
2016 - 4,761,865
Figures courtesy of the CSO Census results