Which ZIP code in Strafford County has the fastest population growth?

03823 (Madbury), at 19.1%, 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.

Fastest-growing ZIP codes in Strafford County, NH

These are the 15 ZIP codes in Strafford County with the fastest population growth, out of 15 with at least 1,000 residents. 03823 (Madbury, 19.1%), 03868 (Rochester, 15.4%) and 03884 (Strafford, 8.8%) 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.

Fastest-growing ZIP codes in Strafford County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	03823	Madbury	19.1%	2,203	735	466
2	03868	Rochester	15.4%	6,133	2,472	2,725
3	03884	Strafford	8.8%	4,306	1,580	1,650
4	03851	Milton	6.2%	4,333	1,625	1,455
5	03820	Dover	5.7%	33,440	15,062	15,667
6	03839	Rochester	5.7%	4,279	1,671	1,557
7	03867	Rochester	5.3%	22,732	9,789	10,611
8	03825	Barrington	2.6%	9,489	3,467	3,903
9	03878	Somersworth	2.0%	12,205	5,245	5,583
10	03861	Lee	2.0%	4,576	1,616	1,765
11	03855	New Durham	1.9%	2,748	1,091	1,257
12	03835	Farmington	-1.8%	6,804	2,807	2,758
13	03869	Rollinsford	-2.6%	2,456	1,026	770
14	03824	Durham	-8.5%	15,080	3,231	3,125
15	03887	Union	-16.2%	1,739	672	914

How we ranked them

Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents. ZIP codes need at least 1,000 residents to be ranked; 15 of 16 qualify.

Which of these to mail, and why

Growing ZIP codes add households every year, which means new homes, new routes and customers without a go-to provider yet. Check the route map: new subdivisions can appear as new carrier routes.

The top five ZIP codes on this list hold 21,474 households, on 39 carrier routes with 21,963 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 03823 on the EDDM route map

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Frequently asked questions

Which ZIP code in Strafford County has the fastest population growth?: 03823 (Madbury), at 19.1%, among 15 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have 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.

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