Connecticut Population By County in 2015

Based on the US Census Vintage data estimates, in 2015, the population of Connecticut was 3,588,561. Among all Connecticut counties, Fairfield[object Promise] had the highest population (945,323), followed by Hartford[object Promise] (896,563), and New Haven[object Promise] (860,506). Windham[object Promise] was the least populated county (116,556).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

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