According to data from the US BLS, the unemployment rate of New Hampshire was 5.4% (sa) in October, 2011. Among all New Hampshire counties, these 3 were among those with high unemployment rates (nsa): Coos (6.3%), Hillsborough (5.4%), and Rockingham (5.4%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Grafton (4%), Sullivan (4.2%), and Cheshire (4.5%).

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

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