Population
107,860
2025
−2.4% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
Mercer County, PA: population growth, jobs and income
Mercer County lost 378 residents between 2024 and 2025 (−0.3%).
Mercer County had an estimated 107,860 residents in 2025, down 2.4% (2,693 fewer people) since 2020. That is slower than Pennsylvania as a whole (+0.5%), and the 53rd fastest growth of 67 counties in Pennsylvania.
Data as of 2025 · updated
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In the Mercer County report
One-time $99 PDF: everything on this page for Mercer County, ranked against Pennsylvania and the U.S., plus these figures that are not on the free page:
- Median gross rent$843/mo2020–24
- Vacant homes, incl. seasonal and second homes8.7%2020–24
- New homes permitted, last 12 months722025-10/2026-09
- Rent growth, 5 yearsIn the report
- Permits in 5+ unit buildingsIn the report
- IRS income moving in (net AGI)In the report
- Neighbouring-county comparison tableIn the report
What's inside: 5 pages
- 1 Summary, headline numbers and ranks (free preview)
- 2 Ranks and the neighbouring-county table
- 3 Migration, with IRS mover and income flows
- 4 Rent, vacant homes, permits and employers
- 5 Every source and the methods
Headline numbers
Net domestic migration
+85
2025
0.8 per 1,000 residents
+386 in total, 2021–2025
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. People moving in from other U.S. counties minus people moving out.
Unemployment rate
4.8%
2025
+0.0 pts since 2019
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics, 2025. Annual average unemployment rate.
New homes permitted
90
2025
+4.7% since 2021
0.8 per 1,000 residents
Source: U.S. Census Bureau, Building Permits Survey, 2025. Housing units authorized by building permits in the year.
Median household income
$59,976
2020–24
+18.7% since 2016–20
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–24. American Community Survey 5-year estimate.
Private-sector employment
40,948
2023
−9.2% since 2018
Source: U.S. Census Bureau, County Business Patterns, 2023. Paid employees of private employers in mid-March (County Business Patterns).
What the numbers say
Net domestic migration added 85 people in 2025: more people moved in from other U.S. counties than moved out.
Private employers had 40,948 paid employees in mid-March 2023, −9.2% since 2018 (County Business Patterns).
Unemployment averaged 4.8% in 2025.
Builders were authorized to start 90 new homes in 2025, or 0.8 per 1,000 residents.
Median household income was $59,976 in the 2020–24 American Community Survey, +18.7% since 2016–20.
Across the 3,107 U.S. counties with a comparable estimate, its population growth ranks 2,566th.
Part of the Hermitage, PA micro area.
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Mercer County population by year
| Year | Population | Change |
|---|---|---|
| 2025 | 107,860 | −378 |
| 2024 | 108,238 | −318 |
| 2023 | 108,556 | −586 |
| 2022 | 109,142 | −860 |
| 2021 | 110,002 | −551 |
| 2020 | 110,553 | – |
Census Bureau population estimates, July 1 of each year.
What drove the change in Mercer County
Mercer County lost 2,693 people since 2020 even though 386 more people moved in from other U.S. counties than left: deaths outnumbered births by 3,119, and net international migration added 63.
| Component | 2025 | 2020–25 | Share |
|---|---|---|---|
| Natural changebirths minus deaths | −468 | −3,119 | |
| International migrationfrom and to other countries | +3 | +63 | |
| Domestic migrationfrom and to other U.S. counties | +85 | +386 | |
| Census adjustmentbalancing residual | +2 | −23 | |
| Total change | −378 | −2,693 |
Census Bureau population estimates, components of change, each year July 1 to June 30. The components add up to the change in the estimate; the Census adjustment is the small balancing figure the Bureau publishes.
How it ranks
| Measure | In Pennsylvania | Among U.S. counties |
|---|---|---|
| Population growth | 53rd of 67 | 2,566th of 3,107 |
| Net domestic migration per 1,000 residents | 37th of 67 | 1,779th of 3,108 |
| Private-sector job growth | 62nd of 67 | 2,775th of 3,092 |
| Median household income | 61st of 67 | 2,061st of 3,107 |
| Lowest unemployment rate | 49th of 67 | 2,406th of 3,108 |
| New homes permitted per 1,000 residents | 53rd of 67 | 2,194th of 3,005 |
1st = highest (lowest for unemployment). Counties are ranked only against others with a figure for the same period.
Get the county report — $99
The County Growth and Demographics Report for Mercer County, PA as a PDF, from federal data: population and migration, housing and rents, permits, private employers and jobs, unemployment, ranks in the state and the country, and neighbouring counties, with a source next to every number. Pay once, no subscription.
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Neighbouring counties
Over 2020–25, Mercer County's population change (−2.4%) was behind 4 of its 6 neighbouring counties and level with Lawrence County and Crawford County.
4 of its 6 neighbouring counties had a higher median household income than Mercer County's $59,976 (2020–24).
| County | Population2025 | Population change2020–25 | Net domestic migration per 1,000 residents2025 | Homes permitted per 1,000 residents2025 | Median household income2020–24 |
|---|---|---|---|---|---|
| Mercer County, PA This county | 107,860 | −2.4% | 0.8 | 0.8 | $59,976 |
| Lawrence County, PA | 83,911 | −2.4% | 3.4 | 0.8 | $61,931 |
| Crawford County, PA | 81,792 | −2.4% | 0.3 | 1.2 | $60,476 |
| Butler County, PA | 200,169 | +3.2% | 6.0 | 6.2 | $89,843 |
| Trumbull County, OH | 198,972 | −1.3% | 0.5 | 0.6 | $56,435 |
| Venango County, PA | 49,346 | −2.0% | 1.9 | 1.0 | $61,522 |
| Mahoning County, OH | 224,706 | −1.4% | 2.5 | 0.8 | $56,942 |
Census Bureau population estimates and building permits, American Community Survey 5-year income. Rates per 1,000 residents. – means no figure, or a base too small for a change or rate (it would swing on a few people). A figure from another period shows its year and is left out of the comparison.
Questions
Is Mercer County growing?
No. Its population fell 2.4% between 2020 and 2025, about 2,693 fewer people (Census Bureau population estimates). Pennsylvania as a whole changed +0.5% over the same years. That ranks 53rd of 67 counties in Pennsylvania for population growth.
How many people moved to Mercer County?
On net, about 85 people in 2025: that many more moved in from other U.S. counties than moved out (Census Bureau net domestic migration estimate).
What is the unemployment rate in Mercer County?
It averaged 4.8% in 2025 (BLS Local Area Unemployment Statistics, annual average).
What is the population of Mercer County?
About 107,860 people, according to the U.S. Census Bureau's population estimate for July 1, 2025.
How many jobs are in Mercer County?
Private employers there had 40,948 paid employees in mid-March 2023, −9.2% since 2018 (Census Bureau County Business Patterns; government jobs and the self-employed are not counted).
What Beacon CRE covers in Pennsylvania
Map, parcel and listing layers cover North and South Carolina only for now. This page and the other Pennsylvania county pages carry the public federal growth figures.
Mercer County data alerts
Email me when Mercer County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Sources and method
- U.S. Census Bureau, Population Estimates Program (Vintage 2025)
- U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics
- U.S. Census Bureau, Building Permits Survey
- U.S. Census Bureau, American Community Survey 5-year estimates
- U.S. Census Bureau, County Business Patterns
Each number shows its own period. Changes compare the latest period with five years earlier (or the earliest period available). Beacon CRE last refreshed these figures on 2026-11-05. Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how we compute every number. More on every layer: data sources and licences.
Jobs outside North and South Carolina use County Business Patterns (paid private-sector employees in mid-March); wages and government jobs are not included.