What stands out worked out from the figures below

Londonderry has grown the fastest since 2010 (+7%).

Merrimack has the most affordable homes ($459k 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	Londonderry	Merrimack
People
Population	26,685Lowest	28,164Highest
Growth since 20102010 → 2020 census	+7%Highest NH: +4.6%	+4.5%Lowest NH: +4.6%
Median age	42.7±0.9Highest 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	20.6%±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+	16.4%±1.9Lowest 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+	47.6%Lowest NH: 40.6%	50.2%Highest NH: 40.6%
Enrolled in collegeshare of residents	4.8%±1Lowest NH: 6%	5.1%±1.2Highest NH: 6%
	Merrimack and Londonderry are within the Census margin of error here, so we can’t say which is really higher.
Cost of living
Household incomemedian	$132,556±$14kHighest 34% above NH	$127,219±$16kLowest 28% above NH
	Londonderry and Merrimack are within the Census margin of error here, so we can’t say which is really higher.
Home valuemedian, owner-occupied	$505,200±$20kHighest 26% above NH	$458,600±$15kLowest 14% above NH
Rentmedian gross, monthly	$1,803±$154Lowest 21% above NH	$1,932±$147Highest 30% above NH
	Merrimack and Londonderry are within the Census margin of error here, so we can’t say which is really higher.
Property taxmedian, yearly	$8,069Highest 21% above NH	$7,345Lowest 10% above NH
Renters paying 30%+of income on rent	48.9%±7.8Highest NH: 48.2%	34.9%±9.4Lowest NH: 48.2%
	Londonderry and Merrimack are within the Census margin of error here, so we can’t say which is really higher.
Below poverty line	2.7%Lowest NH: 7.2%	3%Highest NH: 7.2%
Housing
Homeownersof occupied homes	85.6%Lowest NH: 72.8%	88.9%Highest NH: 72.8%
Typical home builtmedian year	1986Highest 7 yrs newer than NH	1985Lowest 6 yrs newer than NH
Getting to work
Average commuteone way	29 minHighest 7% above NH	27 minLowest about the NH average
Work from home	22.8%±2.7Highest NH: 16.8%	21%±3.3Lowest NH: 16.8%
	Londonderry and Merrimack 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	Londonderry School District	Merrimack School District
High school in town	Londonderry Senior High School	Merrimack High School
Students per teacherat that high school	12.0Lowest	12.5Highest
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.