What stands out worked out from the figures below

Grantham has grown the fastest since 2010 (+14%).

Portsmouth has the most expensive homes ($689k median).

What matters to you?

Pick a few. We’ll pull those rows to the top and mark which town comes out ahead on each. There’s no overall score: what matters is up to you.

Raising kidsAffordabilityOwning a homeShort commuteWorking from homeYounger crowdSettled, older crowdGrowing town

Measure	Grantham	Portsmouth
People
Population	3,465Lowest	22,545Highest
Growth since 20102010 → 2020 census	+14%Highest NH: +4.6%	+5.7%Lowest NH: +4.6%
Median age	50.4±7.5Highest 16% above NH	42.9±2Lowest about the NH average
	Grantham and Portsmouth are within the Census margin of error here, so we can’t say which is really higher.
Kids under 18	19.1%±6.6Highest NH: 18.2%	14%±1.9Lowest NH: 18.2%
	Grantham and Portsmouth are within the Census margin of error here, so we can’t say which is really higher.
Age 65+	17%±6.9Lowest NH: 20.1%	21.9%±2.4Highest NH: 20.1%
	Portsmouth and Grantham are within the Census margin of error here, so we can’t say which is really higher.
Bachelor’s degree+adults 25+	59.6%Lowest NH: 40.6%	64%Highest NH: 40.6%
Enrolled in collegeshare of residents	4.8%±6Highest NH: 6%	3.8%±1.2Lowest NH: 6%
	Grantham and Portsmouth are within the Census margin of error here, so we can’t say which is really higher.
Cost of living
Household incomemedian	$106,403±$54kHighest 7% above NH	$106,219±$7kLowest 7% above NH
	Grantham and Portsmouth are within the Census margin of error here, so we can’t say which is really higher.
Home valuemedian, owner-occupied	$343,100±$39kLowest 15% below NH	$688,500±$39kHighest 71% above NH
Rentmedian gross, monthly	—	$1,869±$111 25% above NH
Property taxmedian, yearly	$7,605Lowest 14% above NH	$8,018Highest 20% above NH
Renters paying 30%+of income on rent	—	50.4%±7.2 NH: 48.2%
Below poverty line	0%Lowest NH: 7.2%	6.8%Highest NH: 7.2%
Housing
Homeownersof occupied homes	100%Highest NH: 72.8%	51.9%Lowest NH: 72.8%
Typical home builtmedian year	1987Highest 8 yrs newer than NH	1959Lowest 20 yrs older than NH
Getting to work
Average commuteone way	23 minHighest 16% below NH	22 minLowest 17% below NH
Work from home	13.8%±6.2Lowest NH: 16.8%	21.9%±4Highest NH: 16.8%
	Portsmouth and Grantham are within the Census margin of error here, so we can’t say which is really higher.
Schools
Public school scoresrank in state, math + reading	#6 of 120 in NH	#11 of 120 in NH
School district	Grantham School District	Portsmouth School District
High school in town	None in town	Portsmouth High School
Students per teacherat that high school	—	11.4
On TownTapestry
Old photos in Our Story	None yet	None yet

NH average · Sources: U.S. Census Bureau, American Community Survey 5-year estimates 2020–2024; 2010 & 2020 decennial census; NCES Common Core of Data. “±” is the Census margin of error. Property tax is top-coded by the Census at $10,000+. School rank compares math and reading proficiency against the state average.