The seasonally adjusted unemployment rate rose to 7.5% in November, according to the CSO.
However, when adjusted to include those in receipt of the Pandemic Unemployment Payment, the figure rose to 21%.
This compares to 20.2% recorded in October.
This measure, which the CSO describes as the 'upper bound' of unemployment, was 30.4% at its height in April before falling to 15.9% in September.
The CSO cautions that at least 23.2% of those aged 15-24 counted as part of the Covid-adjusted unemployment rate are students.
They wouldn't normally be considered unemployed.
The Covid-adjusted unemployment rate for this group was 47.3% last month.
The seasonally adjusted unemployment rate for 15-24 year olds was still high at 20.2% compared to 5.7% for 25-74 year olds.
The seasonally adjusted number of people unemployed rose marginally in November by 6,900.
This increased the rate from 7.2 to 7.5%.
Compared to a year ago, there are 71,800 more people unemployed. The rate in November 2019 was 4.7%.
