According to data from the US BLS, the unemployment rate of Connecticut was 6.4% (sa) in July, 2021. Among all Connecticut counties, these 3 were among those with high unemployment rates (nsa): New Haven (7%), New London (7%), and Hartford (6.9%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Middlesex (5.4%), Tolland (5.6%), and Litchfield (5.6%).

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

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