Which ZIP code in New Haven County has the fastest population growth?

06510 (New Haven), at 78.0%, among 41 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 New Haven County, CT

These are the 25 ZIP codes in New Haven County with the fastest population growth, out of 41 with at least 1,000 residents. 06510 (New Haven, 78.0%), 06704 (Waterbury, 26.2%) and 06706 (Waterbury, 11.1%) lead the list. There is no single "best" ZIP code in New Haven 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 New Haven County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	06510	New Haven	78.0%	4,584	2,542	3,547
2	06704	Waterbury	26.2%	31,713	11,768	10,147
3	06706	Waterbury	11.1%	15,551	5,506	5,742
4	06518	Hamden	5.8%	20,126	6,661	6,984
5	06515	New Haven	3.6%	19,006	7,012	6,787
6	06401	Ansonia	3.2%	19,315	7,258	7,787
7	06525	Woodbridge	2.8%	9,073	3,260	3,493
8	06477	Orange	2.7%	14,315	5,386	5,630
9	06473	North Haven	2.6%	24,743	9,740	10,532
10	06483	Seymour	2.3%	16,889	6,378	7,014
11	06488	Southbury	2.0%	20,071	8,424	8,841
12	06511	New Haven	1.9%	54,730	22,586	23,755
13	06405	Branford	1.8%	28,217	13,178	14,041
14	06450	Meriden	1.4%	35,694	14,609	15,222
15	06512	East Haven	1.4%	28,830	12,083	12,708
16	06762	Middlebury	1.4%	7,807	2,969	3,074
17	06451	Meriden	1.3%	24,851	10,022	10,023
18	06516	West Haven	1.1%	55,351	20,938	22,077
19	06770	Naugatuck	0.8%	31,823	12,749	13,004
20	06708	Waterbury	-0.1%	29,594	11,932	12,477
21	06403	Beacon Falls	-0.3%	6,147	2,649	2,660
22	06492	Wallingford	-0.4%	44,498	18,606	18,771
23	06410	Cheshire	-0.5%	28,904	10,285	10,894
24	06519	New Haven	-0.5%	15,605	5,930	6,089
25	06517	Hamden	-0.6%	14,221	6,078	6,790

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; 41 of 41 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 33,489 households, on 60 carrier routes with 33,207 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 06510 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in New Haven County has the fastest population growth?: 06510 (New Haven), at 78.0%, among 41 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.