According to data from the US BLS, the unemployment rate of Connecticut was 6.7% (sa) in June, 2021. Among all Connecticut counties, these 3 were among those with high unemployment rates (nsa): New London (7.4%), Hartford (7.3%), and New Haven (7.3%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Tolland (5.7%), Middlesex (5.7%), and Litchfield (5.8%).

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

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