Ranking of New Hampshire Counties By Population in 2023

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2023, the Population for New Hampshire was 1.40M. Among all New Hampshire counties, Hillsborough County had the highest population (427.35K), followed by Rockingham County (320.69K), and Merrimack County (157.10K).

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.

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Ranking of New Hampshire Counties By Population in 2023
Hillsborough
427.35K
Rockingham
320.69K
Merrimack
157.10K
Strafford
133.24K
Grafton
93.15K
Cheshire
77.70K
Belknap
65.03K
Carroll
52.45K
Sullivan
43.97K
Coos
31.37K
Ranking of New Hampshire Counties By Population in 2023
Rank
County
Population
1 Hillsborough County 427,354
2 Rockingham County 320,689
3 Merrimack County 157,103
4 Strafford County 133,243
5 Grafton County 93,146
6 Cheshire County 77,703
7 Belknap County 65,027
8 Carroll County 52,448
9 Sullivan County 43,969
10 Coos County 31,372
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