According to data from the US BLS, the unemployment rate of New Hampshire was 3.4% (sa) in October, 2007. Among all New Hampshire counties, these 3 were among those with high unemployment rates (nsa): Coos (3.3%), Rockingham (3.3%), and Belknap (2.9%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Sullivan (2.4%), Grafton (2.5%), and Merrimack (2.6%).

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

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