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

15321 (Cecil), at 33.5%, among 28 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 Washington County, PA

These are the 25 ZIP codes in Washington County with the fastest population growth, out of 28 with at least 1,000 residents. 15321 (Cecil, 33.5%), 15340 (Hickory, 25.2%) and 15330 (Eighty Four, 21.8%) lead the list. There is no single "best" ZIP code in Washington 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 Washington County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	15321	Cecil	33.5%	2,025	760	748
2	15340	Hickory	25.2%	1,524	647	535
3	15330	Eighty Four	21.8%	6,023	2,424	2,590
4	15317	Canonsburg	12.4%	43,871	17,806	19,434
5	15017	Bridgeville	11.6%	17,782	7,987	8,184
6	15345	Marianna	10.6%	1,547	634	352
7	15322	Clarksville	9.5%	1,892	766	629
8	15367	Venetia	7.5%	9,906	3,354	3,615
9	15301	Washington	3.1%	50,348	21,902	22,447
10	15057	Mc Donald	2.6%	16,583	6,141	6,964
11	15022	Charleroi	1.4%	9,959	4,318	4,699
12	15342	Houston	0.3%	5,097	2,261	2,314
13	15314	Bentleyville	-0.4%	3,545	1,347	1,631
14	15329	Prosperity	-0.5%	1,390	543	587
15	15021	Burgettstown	-1.1%	7,110	2,982	2,950
16	15360	Scenery Hill	-1.2%	1,690	689	752
17	15033	Donora	-3.2%	4,572	2,464	2,123
18	15312	Avella	-6.4%	3,603	1,470	1,369
19	15332	Finleyville	-7.8%	7,678	3,634	3,857
20	15063	Monongahela	-8.3%	10,525	4,598	5,006
21	15333	Fredericktown	-10.9%	1,883	762	480
22	15067	New Eagle	-11.0%	2,142	1,093	—
23	15417	Brownsville	-11.5%	7,363	3,292	3,564
24	15323	Claysville	-15.8%	3,860	1,600	1,465
25	15376	West Alexander	-16.9%	1,441	543	640

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; 28 of 58 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 29,624 households, on 56 carrier routes with 31,491 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 15321 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 Washington County has the fastest population growth?: 15321 (Cecil), at 33.5%, among 28 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.