New figures from the Central Statistics Office show that the level of unemployment in September fell to 5.4% from a revised rate of 5.6% in August - the lowest level since February 2008.
The CSO said the seasonally adjusted number of people who were unemployed stood at 129,400 in September, down from 134,200 in the previous month.
The jobless rate has fallen from 6.6% a year ago and a financial crisis-peak of 16 in 2012, when the country was in the middle of a three-year international bailout.
Today's figures also show that the seasonally adjusted unemployment rate in September for men was 5.7%, down from 6.9% in September of last year.
Meanwhile, the seasonally adjusted unemployment rate for women was 5.1%, a decrease from the rate of 6.3% in September last year.
While remaining high, the seasonally adjusted youth unemployment rate fell to 12.9% in September from 13.9% in August.
Commenting on today's CSO figures, Pawel Adrjan - an economist at global job site Indeed - said they show a welcome continuation of the rapid downward unemployment trend Ireland has been experiencing.
The economist said the tighter labour market is demonstrated by the range of hard to fill roles being advertised on Indeed.ie.
These are jobs which have remained unfilled after being advertised for 60 days.
"The top 50 hard to fill roles are dominated by technology, but the list also features finance, legal and healthcare sector jobs", Pawel Adrjan said.
"14 of the top 20 hard to fill roles are for technology related jobs, with each category having at least 35% of advertised positions open for over 60 days.
"This is no surprise given the intense competition for staff with strong IT skills, as big tech companies continue to favour Dublin as a location for expansion and base for their EMEA hubs," the economist added.