Charleroi is a very small borough located in the state of Pennsylvania. With a population of 1,399 people and two associated neighborhoods, Charleroi is the 367th largest community in Pennsylvania. Much of the housing stock in Charleroi was built prior to World War II, making it one of the older and more historic boroughs in the country.

Also of interest is that Charleroi has more people living here who work in computers and math than 95% of the places in the US.

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. 17.66% of adults 25 and older in Charleroi have a college degree.

The per capita income in Charleroi in 2022 was $25,730, 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 $102,920 for a family of four. However, Charleroi contains both very wealthy and poor people as well.

Charleroi is a somewhat 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, English, German, Irish, and Polish.

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