New Hampshire Population By County in 2015

Based on the US Census Vintage data estimates, in 2015, the population of New Hampshire was 1,337,480. Among all New Hampshire counties, Hillsborough[object Promise] had the highest population (409,229), followed by Rockingham[object Promise] (302,975), and Merrimack[object Promise] (148,770). Coos[object Promise] was the least populated county (32,351).

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.