Ranking of New Hampshire Counties By Population in 2019

Based on the US Census Vintage data estimates, in 2019, the Population for New Hampshire was 1.36M. Among all New Hampshire counties, Hillsborough County had the highest population (417.74K), followed by Rockingham County (309.65K), and Merrimack County (151.61K).

The chart below shows the top 10 counties, and the table below shows the ranking of all New Hampshire counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.