According to data from the US BLS, the unemployment rate of Connecticut was 5.2% (sa) in January, 2016. Among all Connecticut counties, these 3 were among those with high unemployment rates (nsa): Windham (6.6%), New Haven (6%), and New London (5.9%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Tolland (5%), Middlesex (5.2%), and Fairfield (5.4%).

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

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