How many people live in Butler County, PA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 199,300 people living in Butler County, PA. That makes Butler County the 19th-most populous county in Pennsylvania. It is home to 1.5% of people living in the state.
199K
population of Butler County, PA (2024)
1.5%
County share of the Pennsylvania population (2024)
About 199,300 people lived in Butler County, PA in 2024.
Population estimates, 2000–2024
What are Butler County, PA’s age demographics?
About 43,800 Butler County, PA residents are aged 65 and older in 2024. That represents 22% of its population. For comparison, the age group represents 20.4% of Pennsylvania’s population and 18% in the US overall.
Another 37,400 Butler County residents, or 18.7% of the population, were children under 18. For comparison, the age group represents 20.1% of Pennsylvania’s population and 21.6% in the US overall.
A higher share of Butler County, PA's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Butler County, PA’s racial and ethnic demographics?
Non-Hispanic white residents make up 93.2% of the Butler County, PA population, higher than the national share of 57.5%.
In contrast, Butler County’s Hispanic population accounts for 2.2%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 1.4% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Butler County, PA has a higher share of a non-Hispanic white population than Pennsylvania as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Butler County, PA is Cranberry with about 35,000 residents in 2024.
Cities and towns in Butler County, PA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Cranberry | 35,004 |
| 2. | Butler | 16,953 |
| 3. | Adams | 15,705 |
| 4. | Butler | 13,010 |
| 5. | Slippery Rock | 8,396 |
| 6. | Buffalo | 8,185 |
| 7. | Center | 7,774 |
| 8. | Middlesex | 7,438 |
| 9. | Jackson | 6,079 |
| 10. | Jefferson | 5,064 |
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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.
