According to data from the US BLS, the unemployment rate of Connecticut was 6.7% (sa) in May, 2021. Among all Connecticut counties, these 3 were among those with high unemployment rates (nsa): New London (7.3%), Hartford (7.1%), and New Haven (7%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Tolland (5.2%), Middlesex (5.3%), and Litchfield (5.5%).

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

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