Demographics of Rockingham County, New Hampshire

Rockingham County, New Hampshire had 324,077 people on July 1, 2025, by the Census Bureau’s estimate: +9,444 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Rockingham County, in four figures

324,077
Population: July 1, 2025, Vintage 2025 estimate.; +3.0%
Change since July 2020: +9,444 people.; 45.0 ±0.1
Median age: ACS 2020–⁠2024.; $118,331 ±$2,820
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Rockingham County, New Hampshire's population grew 3.0% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Rockingham County, New Hampshire's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Rockingham County, New Hampshire's population grew 3.0% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Rockingham County, New Hampshire's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	314,633	100.0	100.0
2021	318,370	101.2	100.2
2022	319,262	101.5	100.7
2023	320,441	101.8	101.6
2024	322,001	102.3	102.5
2025	324,077	103.0	103.1

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Population of Rockingham County, New Hampshire on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	314,633	+440	−78	+9	+427
2021	318,370	+3,737	−91	+173	+3,588
2022	319,262	+892	−260	+118	+1,230
2023	320,441	+1,179	−189	+306	+1,122
2024	322,001	+1,560	−215	+441	+1,336
2025	324,077	+2,076	−106	+235	+1,939

Age, 2020–2024

The median age is 45.0 ±0.1: for men 43.7 ±0.2 and for women 46.1 ±0.2. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Rockingham County by age, ACS 2020–2024
Age	People	Share	New Hampshire	United States
Under 5	14,414 ±79	4.5% ±<0.1	4.5% ±<0.1	5.6% ±<0.1
5 to 17	44,549 ±1,139	14.0% ±0.4	13.7% ±0.2	16.3% ±<0.1
18 to 24	22,282 ±877	7.0% ±0.3	8.7% ±0.2	9.1% ±<0.1
25 to 44	78,432 ±1,265	24.6% ±0.4	25.0% ±0.2	26.9% ±<0.1
45 to 64	94,379 ±1,492	29.6% ±0.5	27.9% ±0.2	24.8% ±<0.1
65 and over	65,026 ±1,496	20.4% ±0.5	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $118,331 ±$2,820, and income per person $61,558 ±$1,159, in 2024 dollars. The median is $99,031 ±$1,123 in New Hampshire and $80,734 ±$166 in the United States.

Households by income

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Households in Rockingham County by income, ACS 2020–2024
Household income	Households	Share	New Hampshire	United States
Under $25,000	10,343 ±914	8.1% ±0.7	10.4% ±0.3	14.6% ±<0.1
$25,000 to $49,999	12,796 ±965	10.0% ±0.8	13.4% ±0.4	16.7% ±<0.1
$50,000 to $74,999	15,710 ±1,061	12.3% ±0.8	14.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	14,495 ±1,116	11.4% ±0.9	12.4% ±0.3	12.6% ±<0.1
$100,000 to $149,999	25,922 ±1,331	20.3% ±1.0	20.0% ±0.5	17.5% ±<0.1
$150,000 to $199,999	18,942 ±894	14.8% ±0.7	12.7% ±0.3	9.6% ±<0.1
$200,000 or more	29,362 ±1,165	23.0% ±0.9	16.8% ±0.4	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Rockingham County by age, ACS 2020–2024
Age	Below poverty	Rate	New Hampshire	United States
All ages	15,114 ±1,277	4.8% ±0.4	7.2% ±0.3	12.5% ±0.1
Under 18	2,709 ±562	4.6% ±1.0	7.9% ±0.6	16.1% ±0.1
18 to 59	7,287 ±785	4.3% ±0.5	6.8% ±0.3	11.6% ±0.1
60 and over	5,118 ±578	5.6% ±0.6	7.7% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Rockingham County, ACS 2020–2024
Measure	Rockingham County	New Hampshire	United States
Housing units	137,794 ±93	648,472 ±247	143,775,355 ±10,234
Occupied	92.6% ±0.6	85.7% ±0.3	89.9% ±0.1
Vacant	7.4% ±0.6	14.3% ±0.3	10.1% ±0.1
Owner occupied	78.4% ±0.8	72.8% ±0.4	65.2% ±0.3
Renter occupied	21.6% ±0.9	27.2% ±0.4	34.8% ±0.1
Median home value	$497,500 ±$6,191	$402,500 ±$2,808	$332,700 ±$236
Median gross rent	$1,687 ±$46	$1,491 ±$15	$1,413 ±$2
Median year built	1983 ±1	1979 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Rockingham County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	New Hampshire	United States
Hispanic or Latino	11,727 ±0	3.7% ±<0.1	4.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	285,708 ±1,077	89.5% ±0.3	86.9% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	2,095 ±389	0.7% ±0.1	1.3% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	6,206 ±437	1.9% ±0.1	2.6% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	108 to 334	< 0.1% to 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	10 to 218	< 0.1% to 0.1%	< 0.1%	0.2% ±<0.1
Some other race alone, not Hispanic	1,510 ±501	0.5% ±0.2	0.4% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	11,501 ±1,138	3.6% ±0.4	4.0% ±0.2	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Rockingham County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	New Hampshire	United States
Born in the state	95,916 ±2,386	30.1% ±0.7	40.8% ±0.4	57.3% ±<0.1
Born in another state	203,312 ±2,442	63.7% ±0.8	51.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	3,144 ±522	1.0% ±0.2	1.3% ±0.1	1.7% ±<0.1
Born abroad	16,710 ±1,192	5.2% ±0.4	6.1% ±0.2	14.1% ±<0.1
Naturalized citizens	11,099 ±895	3.5% ±0.3	3.7% ±0.1	7.4% ±<0.1
Not citizens	5,611 ±877	1.8% ±0.3	2.4% ±0.1	6.8% ±<0.1

Rockingham County among the counties of New Hampshire

2nd of 10 by population, July 2025. Every one is listed on the New Hampshire page.

Counties of New Hampshire near Rockingham County in population, July 2025
County	July 2025	Change since 2020
Hillsborough County	433,415	+2.5%
Rockingham County	324,077	+3.0%
Merrimack County	158,078	+2.6%
Strafford County	135,043	+3.0%
Grafton County	93,225	+2.2%
Cheshire County	78,269	+2.3%
Belknap County	65,147	+2.1%

Elsewhere on the site

Rankings this appears in

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026