According to data from the US BLS, the unemployment rate of Connecticut was 5.1% (sa) in December, 2021. Among all Connecticut counties, these 3 were among those with high unemployment rates (nsa): New London (4.5%), New Haven (4.3%), and Hartford (4.2%).

On the hand, the following three counties were among those with low unemployment rates (nsa): Middlesex (3.3%), Tolland (3.6%), and Litchfield (3.6%).

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

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