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County · Pennsylvania
Westmoreland County
350,935Population
-1.0 %Change since 2020
1,324Net migration
4.2 %Unemployment rate
Facts
- Population
- 350,935 (2024)
- Change since 2020
- -1.0 %
- Net migration
- 1,324 (2023)
- Unemployment rate
- 4.2 % (2025)
- State
- Pennsylvania
- Population base, April 2020
- 354,648 (2020)
- Births
- 2,891 (2023)
- Births per 1,000 residents, 2023
- 8.2
- Deaths
- 4,746 (2023)
- Deaths per 1,000 residents, 2023
- 13.5
- Natural change, 2023
- -1,855
- International migration
- 292 (2023)
- Domestic migration
- 1,032 (2023)
- Net migration per 1,000, 2023
- 3.8
- Postal code
- PA
- FIPS code
- 42129
Sources: US Census Bureau — Population Estimates, Bureau of Labor Statistics — LAUS
Unemployment rate, annual average
| Period | Value |
|---|---|
| 2025 | 4.2 % |
| 2024 | 3.8 % |
| 2023 | 3.8 % |
| 2022 | 4.4 % |
| 2021 | 6.0 % |
| 2020 | 9.0 % |
| 2019 | 4.5 % |
| 2018 | 4.6 % |
| 2017 | 5.3 % |
| 2016 | 5.9 % |
| 2015 | 5.5 % |
| 2014 | 5.8 % |
Population estimates, 2020–2024
| Period | Value |
|---|---|
| 2024 | 350,935 |
| 2023 | 351,420 |
| 2022 | 352,054 |
| 2021 | 353,753 |
| 2020 | 354,339 |