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

02142 (Cambridge), at 28.9%, among 82 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 Middlesex County, MA

These are the 25 ZIP codes in Middlesex County with the fastest population growth, out of 82 with at least 1,000 residents. 02142 (Cambridge, 28.9%), 01474 (West Townsend, 26.5%) and 02464 (Newton Upper Falls, 15.2%) lead the list. There is no single "best" ZIP code in Middlesex 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 Middlesex County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	02142	Cambridge	28.9%	4,737	2,153	3,296
2	01474	West Townsend	26.5%	2,280	756	656
3	02464	Newton Upper Falls	15.2%	3,833	1,496	1,314
4	01862	North Billerica	14.2%	12,129	4,364	4,033
5	01432	Ayer	10.7%	8,521	3,567	3,768
6	02420	Lexington	10.2%	16,215	5,653	5,535
7	01748	Hopkinton	10.0%	19,358	6,660	7,069
8	01850	Lowell	9.8%	17,740	6,089	5,825
9	01851	Lowell	8.9%	33,403	11,421	11,087
10	02149	Everett	8.5%	50,045	17,466	19,531
11	02148	Malden	8.1%	65,906	26,042	26,642
12	02453	Waltham	7.1%	31,591	12,610	12,835
13	01721	Ashland	6.6%	18,873	7,643	7,765
14	02452	Waltham	6.0%	15,808	5,362	5,358
15	02462	Newton Lower Falls	5.8%	1,470	515	642
16	02176	Melrose	5.5%	29,650	12,401	12,476
17	01752	Marlborough	4.8%	41,647	16,665	18,512
18	01852	Lowell	4.5%	37,144	15,071	15,339
19	01730	Bedford	4.5%	14,707	5,869	5,730
20	01863	North Chelmsford	4.5%	9,796	3,573	4,229
21	01826	Dracut	4.3%	32,629	12,270	12,320
22	02478	Belmont	4.1%	27,175	10,412	10,482
23	01854	Lowell	4.0%	30,081	10,602	10,323
24	01880	Wakefield	4.0%	27,793	11,270	11,537
25	01801	Woburn	3.9%	41,939	16,432	18,695

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; 82 of 83 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 12,336 households, on 23 carrier routes with 13,067 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 02142 on the EDDM route map

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Frequently asked questions

Which ZIP code in Middlesex County has the fastest population growth?: 02142 (Cambridge), at 28.9%, among 82 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.