New figures from the Central Statistics Office show that the seasonally adjusted unemployment rate fell to 6.2% in December.
This was down from the revised rate of 6.4% in November and compares to a jobless rate of 7.5% in December of 2016.
The jobless rate had originally fallen to a fresh low of 6% in October but the CSO said the introduction of a new survey, which included 2016 census data, had led to adjustments to the historic series.
The CSO said the seasonally adjusted number of people unemployed was 146,700 in December, down from 149,900 when compared to the November figure.
It also marked an annual decrease of 26,900.
Today's CSO figures show that the seasonally adjusted unemployment rate for men was 6.6% in December, down from 7.6% in December 2016.
The seasonally adjusted unemployment rate for women was 5.8%, down from 7.2% in December of the previous year.
Meanwhile, the seasonally adjusted youth unemployment rate stood at 13.7% in December, down from 14% in November 2017.