According to data from the US BLS, the unemployment rate of Connecticut was 6.2% (sa) in August, 2021. Among all Connecticut counties, these 3 were among those with high unemployment rates (nsa): Hartford (6.5%), New Haven (6.5%), and New London (6.5%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Middlesex (4.9%), Tolland (5.1%), and Litchfield (5.1%).

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

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