library(sf)
#> Linking to GEOS 3.10.2, GDAL 3.4.1, PROJ 8.2.1; sf_use_s2() is TRUE

There are too many regions stored here now that the state is switching to COGs instead of counties. Here’s a visual reference to them. Note that Greater Hartford and the Capitol Region COG are the same, as are Greater Bridgeport and Connecticut Metro COG.