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

06901 (Stamford), at 53.6%, among 46 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 Fairfield County, CT

These are the 25 ZIP codes in Fairfield County with the fastest population growth, out of 46 with at least 1,000 residents. 06901 (Stamford, 53.6%), 06604 (Bridgeport, 17.0%) and 06850 (Norwalk, 10.3%) lead the list. There is no single "best" ZIP code in Fairfield 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 Fairfield County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	06901	Stamford	53.6%	11,037	6,071	—
2	06604	Bridgeport	17.0%	31,771	12,534	11,752
3	06850	Norwalk	10.3%	19,692	8,138	9,487
4	06855	Norwalk	9.5%	9,351	3,516	3,820
5	06890	Southport	7.7%	4,653	1,791	1,832
6	06614	Stratford	7.1%	35,654	13,640	13,353
7	06482	Sandy Hook	6.7%	12,000	4,142	4,196
8	06810	Danbury	6.3%	55,833	21,218	21,531
9	06801	Bethel	5.9%	20,796	7,782	8,246
10	06605	Bridgeport	5.3%	25,929	10,380	9,768
11	06902	Stamford	4.9%	73,392	28,959	28,529
12	06831	Greenwich	4.3%	15,210	5,382	5,843
13	06854	Norwalk	4.1%	32,118	11,769	11,741
14	06606	Bridgeport	4.0%	49,308	17,649	17,193
15	06824	Fairfield	3.9%	36,716	11,940	12,487
16	06611	Trumbull	3.6%	37,281	12,153	13,855
17	06804	Brookfield	3.6%	17,908	6,638	7,521
18	06907	Stamford	3.2%	8,705	3,541	3,778
19	06840	New Canaan	2.9%	20,870	7,153	7,492
20	06870	Old Greenwich	2.9%	7,864	2,756	2,794
21	06851	Norwalk	2.8%	27,865	11,348	11,658
22	06878	Riverside	2.7%	8,328	2,686	2,861
23	06905	Stamford	2.2%	20,725	8,503	9,046
24	06612	Easton	1.9%	7,670	2,539	2,733
25	06484	Shelton	1.8%	41,889	16,096	18,100

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; 46 of 46 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 32,050 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 06901 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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EDDM guides

Frequently asked questions

Which ZIP code in Fairfield County has the fastest population growth?: 06901 (Stamford), at 53.6%, among 46 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.