Tarentum is a very small borough located in the state of Pennsylvania. With a population of 4,187 people and four associated neighborhoods, Tarentum is the 348th largest community in Pennsylvania. Tarentum has an unusually large stock of pre-World War II architecture, making it one of the older and more historic boroughs.

The population of Tarentum 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 Tarentum, 23.78% have at least a bachelor's degree.

The per capita income in Tarentum in 2022 was $28,019, 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 $112,076 for a family of four. However, Tarentum contains both very wealthy and poor people as well.

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

The most common language spoken in Tarentum is English. Other important languages spoken here include Italian and French.