According to data from the US BLS, the unemployment rate of New Hampshire was 2.6% (sa) in September, 2019. Among all New Hampshire counties, these 3 were among those with high unemployment rates (nsa): Coos (2.5%), Rockingham (2.5%), and Cheshire (2.4%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Merrimack (2.1%), Sullivan (2.2%), and Grafton (2.2%).

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

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