What stands out worked out from the figures below

Londonderry has grown the fastest since 2010 (+5.5%).

Merrimack has the most kids (22% under 18).

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	Londonderry	Merrimack
People
Population	12,225Lowest	28,164Highest
Growth since 20102010 → 2020 census	+5.5%Highest NH: +4.6%	+4.5%Lowest NH: +4.6%
Median age	42.4±1Highest about the NH average	41.5±2.2Lowest 4% below NH
	Londonderry and Merrimack are within the Census margin of error here, so we can’t say which is really higher.
Kids under 18	18.6%±2.1Lowest NH: 18.2%	22%±2.5Highest NH: 18.2%
	Merrimack and Londonderry are within the Census margin of error here, so we can’t say which is really higher.
Age 65+	16.5%±2Lowest NH: 20.1%	16.8%±1.8Highest NH: 20.1%
	Merrimack and Londonderry are within the Census margin of error here, so we can’t say which is really higher.
Bachelor’s degree+adults 25+	46%Lowest NH: 40.6%	50.2%Highest NH: 40.6%
Enrolled in collegeshare of residents	6.1%±1.7Highest NH: 6%	5.1%±1.2Lowest NH: 6%
	Londonderry and Merrimack are within the Census margin of error here, so we can’t say which is really higher.
Cost of living
Household incomemedian	$119,571±$13kLowest 21% above NH	$127,219±$16kHighest 28% above NH
	Merrimack and Londonderry are within the Census margin of error here, so we can’t say which is really higher.
Home valuemedian, owner-occupied	$469,500±$23kHighest 17% above NH	$458,600±$15kLowest 14% above NH
	Londonderry and Merrimack are within the Census margin of error here, so we can’t say which is really higher.
Rentmedian gross, monthly	$1,952±$135Highest 31% above NH	$1,932±$147Lowest 30% above NH
	Londonderry and Merrimack are within the Census margin of error here, so we can’t say which is really higher.
Property taxmedian, yearly	$7,568Highest 14% above NH	$7,345Lowest 10% above NH
Renters paying 30%+of income on rent	60.6%±13.9Highest NH: 48.2%	34.9%±9.4Lowest NH: 48.2%
Below poverty line	2.9%Lowest NH: 7.2%	3%Highest NH: 7.2%
Housing
Homeownersof occupied homes	83.8%Lowest NH: 72.8%	88.9%Highest NH: 72.8%
Typical home builtmedian year	1983Lowest 4 yrs newer than NH	1985Highest 6 yrs newer than NH
Getting to work
Average commuteone way	28 minHighest 4% above NH	27 minLowest about the NH average
Work from home	20.4%±2.8Lowest NH: 16.8%	21%±3.3Highest NH: 16.8%
	Merrimack and Londonderry 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	#37 of 120 in NH	#58 of 120 in NH
School district	—	Merrimack School District
High school in town	—	Merrimack High School
Students per teacherat that high school	—	12.5
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.