More than 13% of people under 60 were living in jobless households at the end of June, according to the Central Statistics Office.
This compared to 14.5% in the same period of last year.
The midlands region had the highes proportion of under 60s living in jobless households at 15.2%, while the mid-east of the country had the lowest at 11.3%.
The latest Quarterly National Household Survey from the CSO gives a picture of the composition of households across the country.
It shows that more than half of all households in the State at the end of June were comprised of one or two people.
Around 384,400 households contained a single person, according to the CSO, while 365,300 comprised of a couple without children.
A further 645,300 contained a couple with children, while there were 191,100 lone parent family households.
The unemployment rate for people aged 15-74 was 9.8% in the second quarter of the year, according to the figures.
Amongst adult couples without children, the rate was 6.3%, while adults with children had a rate of 7.2%.
Lone parents, meanwhile, had an unemployment rate of 14.7% in the same period.