Is Mercer County, PA's population growing or shrinking?
Updated annually
It shrank by 379 between 2023 and 2024. Changes in population reflect birth and death rates, immigration patterns, regional shifts, and even the overall health of the economy. Mercer County, PA’s 0.35% annual decrease was primarily driven by deaths outpacing births.
In the decade between 2014 and 2024, Mercer County, PA’s population shrank by 5.7%.
-379
population change (2023 to 2024)
-0.35%
percent change in population (2023 to 2024)
Since 2000, Mercer County, PA’s population increased 2 out of 24 years. The largest increase occurred between 2019 and 2020, when Mercer County, PA gained 1,300 residents. Its largest decline occurred between 2018 and 2019 when there were 1,300 fewer residents.
Mercer County, PA lost 379 residents between 2023 and 2024.
Annual population change
A county’s population is influenced by three factors:
- Natural population change: If births outnumber deaths in a given year, natural population growth is positive. If deaths exceed births, it is negative. Between 2023 and 2024 natural population change was negative in Mercer County, PA, with deaths exceeding births by 550.
- Immigration: international migration directly into or out of a county: If more people move in than move out, population change from immigration is positive. If more people move out than move in, it’s negative. Between 2023 to 2024, Mercer County, PA’s population change from immigration was positive with about 43 more people coming from another country directly to Mercer County, PA than leaving.
- Domestic migration, moving between counties: Between 2023 to 2024, Mercer County, PA’s population change from domestic migration was positive with about 139 more people coming from any other county in the US.
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Between 2023 and 2024, natural change was the primary driver of population decline in Mercer County, PA.
Components of population change
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
