Londonderry, NH population, income and ZIP codes

Londonderry CDP is a mid-size town in New Hampshire, with 12,307 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #12 of 100 ranked by population — larger than 88% of them. The median age here is 42.5 years against 39.1 nationally, a slightly older profile than the country as a whole. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in Londonderry CDP earn a median of $113,109 a year, 44% above the national figure of $78,538 and 46% above the $77,368 median for the 65 New Hampshire cities we cover. Median household income counts every pre-tax dollar arriving at an address — wages, self-employment, Social Security, pensions, interest and public assistance — for everyone living there, so multi-earner households pull the figure up even where individual pay is modest. Poverty reaches 2.8% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Londonderry CDP is valued at $433,100, 42.7% above the national figure and 60% above the $271,300 peer median, while median gross rent runs $1,917 a month, 36.3% above the national figure, or roughly $23,004 across a full year. A household on the local median income would put about 20.3% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 3.8×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 83.3% of occupied homes are owner-occupied versus 65% nationally, an owner-dominated market where rental listings are scarce and rent medians rest on a thin sample. Rent is reported gross — contract rent plus tenant-paid utilities — which is why it runs above the advertised price on a listing for the same unit.

Every value on this page is published directly by the Census for this area — nothing is modelled or interpolated. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.