According to data from the US BLS, the unemployment rate of Connecticut was 8.3% (sa) in February, 2013. Among all Connecticut counties, these 3 were among those with high unemployment rates (nsa): Windham (9.8%), New Haven (9.6%), and New London (9%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Tolland (7.7%), Middlesex (7.7%), and Fairfield (8.1%).

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

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