According to data from the US BLS, the unemployment rate of Connecticut was 8.6% (sa) in August, 2009. Among all Connecticut counties, these 3 were among those with high unemployment rates (nsa): New Haven (9.5%), Hartford (9.2%), and Windham (9.1%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Tolland (7.3%), Middlesex (7.3%), and New London (7.9%).

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

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