- Du Bois is a small city located in the state of Pennsylvania, United States. It is situated in Clearfield County and has a population of around 7,800 people. Du Bois is known for being a former lumber town and is now a commercial center in the region. The city offers various amenities and attractions, including parks, shopping centers, and historical sites. Additionally, Du Bois has a rich cultural heritage and hosts several events and festivals throughout the year.