According to data from the US BLS, the unemployment rate of New Hampshire was 4.2% (sa) in January, 2021. Among all New Hampshire counties, these 3 were among those with high unemployment rates (nsa): Coos (6.3%), Belknap (5.3%), and Carroll (5.2%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Sullivan (4.2%), Grafton (4.2%), and Strafford (4.4%).

The chart and table below shows the unemployment rate (nsa) for each county.

You can see similar information by state for the United States.