Butler County Pennsylvania Population 2024 Population. In 2023, butler county was one of only two counties in western pennsylvania and 23 counties statewide to see its population increase, according to u.s. Census data for butler county, pa (pop.
That pattern broke in 2020, as the 88% white county, which. In 2022, butler county, pa had a population of 195k people with a median age of 43.4 and a median household income of $82,932.