ZIP code 03303

ZIP 03303 is a mid-size town in Merrimack County, New Hampshire, with 16,368 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #19 of 246 ranked by population — larger than 92% of them. The median age here is 42.1 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 ZIP 03303 earn a median of $79,688 a year, 1.5% above the national figure of $78,538. The median is the midpoint household, not an average, so a handful of very high earners cannot drag it upward the way they distort a mean. Poverty reaches 9.2% of residents here, below the 12.4% national rate.

The typical owner-occupied home in ZIP 03303 is valued at $274,100, 9.7% below the national figure, while median gross rent runs $1,363 a month, 3.1% below the national figure, or roughly $16,356 across a full year. A household on the local median income would put about 20.5% 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 3.4×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 68.4% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. 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.

ZIP 03303 is tabulated inside Merrimack County, New Hampshire, one of 28 ZIP areas the Census publishes for that county and 246 across New Hampshire. This is a mid-sized suburban ZIP inside a county that is split across many delivery areas. County assignment on this page follows the largest share of the ZIP's land area, which matters where a delivery route crosses a county line: mail addressed to 03303 can be handled by a post office in a neighbouring county even though the tabulation area is filed here.

Against its own county, 03303 reports a median household income of $79,688, 20% below the $99,237 county median, and 14% below the $92,797 typical NH ZIP. Owner-occupied homes are valued at a median of $274,100, 14% below the county figure and 19% below the statewide ZIP median. Rent is reported gross — the contract amount plus tenant-paid utilities — at $1,363 a month, which is why it reads higher than the advertised rent on a listing for the same unit.

New Hampshire charges 0% statewide, and no local sales tax is layered on top, so the state rate is the full amount collected in 03303.

Everything above comes from the Census Bureau American Community Survey 2019-2023 ACS 5-year estimates for this ZIP Code Tabulation Area, with sales tax rates traced to the state revenue agency. Five-year estimates pool sixty months of responses, so they are stable enough to compare 03303 with its neighbours but always trail the current year, and any value the Census suppressed for sample size is shown as unpublished rather than filled in with a model.