New figures from the Central Statistics Office show that the seasonally adjusted Live Register total for April was 170,600 people, down by 200 people the previous month.
The CSO said the 25-34 years age group made up the largest number of those on the Live Register in April at 39,731 people or 23.9% of the total.
Today's figures show that the unadjusted Live Register total stood at 166,312 people for April, of which 56.6% were men.
This marked a decrease of 1,648 people or 10% compared with the same month last year.
The counties with the biggest percentage decreases in numbers on the Live Register in April were Monaghan, with numbers there down by 9.9% and Clare, which saw a fall of 7.8%.
The counties that saw the biggest percentage increases were Dublin, with figures there up 5.2%, and Limerick, which saw a 4.5% increase.
The Live Register is not designed to measure unemployment as it includes part-time workers as well as seasonal and casual workers who are entitled to Jobseeker's Benefit or Jobseeker's Allowance.
Figures earlier this week from the CSO showed that the seasonally adjusted unemployment rate fell to 4.8% in April from a revised 5% in March after data for the preceding months were revised up.
The CSO said the jobless rate for March was revised up to 5% from 4.7% previously, with similar revisions applied to data for January and February.
The jobless rate has remained between 4.6% and 5.1% for the last year.
