Butler is a somewhat small city located in the state of Pennsylvania. With a population of 13,176 people and 15 associated neighborhoods, Butler is the 70th largest community in Pennsylvania. Butler has an unusually large stock of pre-World War II architecture, making it one of the older and more historic cities.

The population of Butler overall has a level of education that is slightly above the US average for all US cities and towns of 21.84%. Of adults 25 and older in Butler, 22.25% have at least a bachelor's degree.

The per capita income in Butler in 2022 was $26,681, which is low income relative to Pennsylvania, and lower middle income relative to the rest of the US. This equates to an annual income of $106,724 for a family of four. However, Butler contains both very wealthy and poor people as well.

The people who call Butler home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Butler residents report their race to be White, followed by Black or African-American. Important ancestries of people in Butler include German, Irish, Italian, English, and Polish.

The most common language spoken in Butler is English. Other important languages spoken here include Spanish and Greek.