CT News Junkie has a town-by-town map using the latest Census data.
Some spoilers:
Ansonia lost 2 percent of its population (331 people) between 2010 and 2020.
Beacon Falls minus 1 percent.
Derby minus 4 percent.
Naugatuck minus 1 percent.
Oxford remained the same (after massive growth between 2000 and 2010).
Seymour plus 1 percent.
Shelton plus 3 percent.
