Charleroi is a very small borough located in the state of Pennsylvania. With a population of 4,174 people and two associated neighborhoods, Charleroi is the 367th largest community in Pennsylvania. Charleroi has a large stock of pre-World War II architecture, making it one of the older and more historic boroughs in the country.

A relatively large number of people in Charleroi telecommute to their jobs. Overall, about 7.30% of the workforce works from home. While this may seem like a small number, as a fraction of the total workforce it ranks among the highest in the country. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

The education level of Charleroi citizens, measured as those with bachelor's degrees or advanced degrees, is similar to the national average for all American cities and towns. 17.18% of adults 25 and older in Charleroi have a college degree.

The per capita income in Charleroi in 2022 was $24,564, which is low income relative to Pennsylvania and the nation. This equates to an annual income of $98,256 for a family of four. However, Charleroi contains both very wealthy and poor people as well.

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

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