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. Much of the housing stock in Tarentum was built prior to World War II, making it one of the older and more historic boroughs in the country.

The citizens of Tarentum are slightly better educated than the national average of 21.84% for all cities and towns, with 23.78% of adults in Tarentum having a bachelor's degree or advanced 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.