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

15637 (Herminie), at 20.8%, among 36 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 Westmoreland County, PA

These are the 25 ZIP codes in Westmoreland County with the fastest population growth, out of 36 with at least 1,000 residents. 15637 (Herminie, 20.8%), 15668 (Murrysville, 20.4%) and 15670 (New Alexandria, 17.6%) lead the list. There is no single "best" ZIP code in Westmoreland 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 Westmoreland County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	15637	Herminie	20.8%	1,821	749	833
2	15668	Murrysville	20.4%	14,584	5,711	5,607
3	15670	New Alexandria	17.6%	3,675	1,505	1,376
4	15679	Ruffs Dale	15.9%	2,781	1,445	1,296
5	15610	Acme	10.7%	3,988	1,746	1,559
6	15681	Saltsburg	7.7%	4,698	1,926	1,953
7	15085	Trafford	6.3%	8,062	3,397	3,544
8	15954	Seward	5.6%	2,279	1,121	852
9	15089	West Newton	5.2%	6,789	3,016	2,852
10	15944	New Florence	4.8%	3,063	1,220	1,252
11	15642	Irwin	4.6%	46,325	19,251	19,960
12	15687	Stahlstown	4.5%	1,241	549	543
13	15626	Delmont	3.1%	5,129	2,607	2,492
14	15672	New Stanton	2.4%	3,321	1,532	1,434
15	15639	Hunker	1.5%	2,160	878	835
16	15012	Belle Vernon	1.3%	15,412	7,061	7,306
17	15666	Mount Pleasant	1.2%	15,980	7,308	7,127
18	15618	Avonmore	0.6%	2,386	1,100	931
19	15683	Scottdale	0.1%	7,643	3,579	3,574
20	15644	Jeannette	-0.1%	18,512	8,547	8,729
21	15697	Youngwood	-0.2%	2,877	1,347	1,349
22	15601	Greensburg	-0.9%	56,425	24,492	26,314
23	15627	Derry	-1.8%	6,167	2,848	2,856
24	15068	New Kensington	-2.2%	36,203	16,821	17,115
25	15479	Smithton	-2.6%	2,010	827	651

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; 36 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 11,156 households, on 23 carrier routes with 10,671 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 15637 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 Westmoreland County has the fastest population growth?: 15637 (Herminie), at 20.8%, among 36 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.