There was a 10% fall in the number of births in 2022 in comparison to 2021, according to the Central Statistics Office.
This represented an annual birth rate of 10.5 per 1,000 of population compared to 15.6 per 1,000 ten years earlier.
The figures mirror a drop in the fertility rate, which has been continuing to fall over the past five decades.
In order for a population to replace itself, the fertility rates needs to be 2.1% or higher, ignoring the effect of migration.
In 2022 the rate was 1.5% compared to 3.9% in 1972.
The figures reflect the fact that Ireland's population is ageing.
While the number of births is falling, the number of people living in the country is rising due to net migration.
The CSO also said that the average age of mothers giving birth has been getting older.
In 1972, it was 29.1 years, compared to 29.7 years in 1992. In 2022, the average age jumped to 33.2 years.
There were 35,804 deaths in Ireland in 2022, which is equivalent to a rate of 6.9 deaths per 1,000 total population, unchanged from 2021.
