Which ZIP code in Strafford County has the lowest median age?

03824 (Durham), at 20.8 (±0.3), among 15 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Youngest ZIP codes in Strafford County, NH

These are the 15 ZIP codes in Strafford County with the lowest median age, out of 15 with at least 1,000 residents. 03824 (Durham, 20.8), 03820 (Dover, 36.9) and 03823 (Madbury, 37.7) lead the list. There is no single "best" ZIP code in Strafford County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in Strafford County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	03824	Durham	20.8 ±0.3	15,080	3,231	3,125
2	03820	Dover	36.9 ±1.9	33,440	15,062	15,667
3	03823	Madbury	37.7 ±2.1	2,203	735	466
4	03869	Rollinsford	38.2 ±5.4	2,456	1,026	770
5	03839	Rochester	38.3 ±3.1	4,279	1,671	1,557
6	03878	Somersworth	38.5 ±2.7	12,205	5,245	5,583
7	03825	Barrington	38.7 ±2.3	9,489	3,467	3,903
8	03868	Rochester	42.1 ±5.6	6,133	2,472	2,725
9	03861	Lee	42.9 ±1.9	4,576	1,616	1,765
10	03887	Union	43.0 ±8.4	1,739	672	914
11	03867	Rochester	44.0 ±2.1	22,732	9,789	10,611
12	03851	Milton	45.3 ±2.3	4,333	1,625	1,455
13	03884	Strafford	46.3 ±2.1	4,306	1,580	1,650
14	03855	New Durham	46.5 ±7.5	2,748	1,091	1,257
15	03835	Farmington	49.0 ±7.2	6,804	2,807	2,758

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 15 of 16 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 21,725 households, on 40 carrier routes with 21,585 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 03824 on the EDDM route map

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Frequently asked questions

Which ZIP code in Strafford County has the lowest median age?: 03824 (Durham), at 20.8 (±0.3), among 15 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.