The figures represent a monthly decrease of 1,800
There was a drop of 34,496 on the Live Register between December 2014 and last month.
Figures from the Central Statistics Office (CSO) show there were 321,616 people signing on, a decrease of 9.7% on December 2014.
Seasonally adjusted firgures show a monthly decrease of 1,800 - which is a drop of 0.5% on November.
This reduces the seasonally adjusted total unemployed to 328,600.
The seasonally adjusted unemployment rate for December 2015 was unchanged at 8.8%.
The Live Register showed a monthly decrease of 1,000 men and 800 women last month.