Connecticut Population By County in 2017

Based on the US Census Vintage data estimates, in 2017, the population of Connecticut was 3,575,324. Among all Connecticut counties, Fairfield[object Promise] had the highest population (944,107), followed by Hartford[object Promise] (893,141), and New Haven[object Promise] (857,845). Windham[object Promise] was the least populated county (116,489).

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.