Oldest ZIP codes in Westmoreland County, PA
These are the 25 ZIP codes in Westmoreland County with the highest median age, out of 38 with at least 1,000 residents. 15679 (Ruffs Dale, 57.5), 15658 (Ligonier, 55.2) and 15687 (Stahlstown, 54.6) 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.
Oldest ZIP codes in Westmoreland County
| Rank | ZIP | Mailing city | Median age | Residents | Households | Residential mailboxes |
|---|---|---|---|---|---|---|
| 1 | 15679 | Ruffs Dale | 57.5 ±3.3 | 2,781 | 1,445 | 1,296 |
| 2 | 15658 | Ligonier | 55.2 ±4.1 | 8,115 | 3,790 | 3,853 |
| 3 | 15687 | Stahlstown | 54.6 ±2.4 | 1,241 | 549 | 543 |
| 4 | 15626 | Delmont | 53.0 ±5.6 | 5,129 | 2,607 | 2,492 |
| 5 | 15618 | Avonmore | 52.8 ±3.5 | 2,386 | 1,100 | 931 |
| 6 | 15954 | Seward | 52.2 ±3.1 | 2,279 | 1,121 | 852 |
| 7 | 15613 | Apollo | 51.2 ±2.4 | 12,854 | 5,368 | 5,951 |
| 8 | 15666 | Mount Pleasant | 50.2 ±3.4 | 15,980 | 7,308 | 7,127 |
| 9 | 15610 | Acme | 50.2 ±2.2 | 3,988 | 1,746 | 1,559 |
| 10 | 15668 | Murrysville | 49.9 ±5.4 | 14,584 | 5,711 | 5,607 |
| 11 | 15632 | Export | 49.7 ±3.6 | 8,377 | 3,588 | 4,187 |
| 12 | 15717 | Blairsville | 49.4 ±4.7 | 9,206 | 3,999 | 4,337 |
| 13 | 15089 | West Newton | 49.1 ±1.9 | 6,789 | 3,016 | 2,852 |
| 14 | 15531 | Boswell | 49.1 ±3.0 | 3,603 | 1,620 | 1,684 |
| 15 | 15627 | Derry | 48.8 ±3.0 | 6,167 | 2,848 | 2,856 |
| 16 | 15656 | Leechburg | 48.4 ±2.8 | 9,506 | 4,160 | 4,390 |
| 17 | 15012 | Belle Vernon | 48.0 ±2.7 | 15,412 | 7,061 | 7,306 |
| 18 | 15683 | Scottdale | 47.8 ±6.0 | 7,643 | 3,579 | 3,574 |
| 19 | 15644 | Jeannette | 47.2 ±2.9 | 18,512 | 8,547 | 8,727 |
| 20 | 15697 | Youngwood | 47.2 ±7.1 | 2,877 | 1,347 | 1,346 |
| 21 | 15670 | New Alexandria | 46.3 ±8.0 | 3,675 | 1,505 | 1,376 |
| 22 | 15068 | New Kensington | 46.2 ±2.1 | 36,203 | 16,821 | 17,115 |
| 23 | 15601 | Greensburg | 46.0 ±1.5 | 56,425 | 24,492 | 26,308 |
| 24 | 15650 | Latrobe | 45.8 ±1.7 | 26,312 | 11,422 | 12,037 |
| 25 | 15085 | Trafford | 45.8 ±2.9 | 8,062 | 3,397 | 3,544 |
How we ranked them
Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 38 of 83 qualify.
Which of these to mail, and why
Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.
The top five ZIP codes on this list hold 9,491 households, on 23 carrier routes with 9,115 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.
Open 15679 on the EDDM route map
More rankings
- Richest ZIP codes in Westmoreland County
- ZIP codes with the highest home values in Westmoreland County
- ZIP codes with the highest homeownership in Westmoreland County
- ZIP codes with the most families with kids in Westmoreland County
- ZIP codes with the most new movers in Westmoreland County
- Youngest ZIP codes in Westmoreland County
- Fastest-growing ZIP codes in Westmoreland County
- All Westmoreland County ZIP codes
Businesses that mail these ZIP codes
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Frequently asked questions
- Which ZIP code in Westmoreland County has the highest median age?
- 15679 (Ruffs Dale), at 57.5 (±3.3), among 38 ZIP codes with at least 1,000 residents.
- How is this ranking calculated?
- Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024).
- 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.