Tarentum is a very small borough located in the state of Pennsylvania. With a population of 4,183 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 percentage of people in Tarentum who are college-educated is somewhat higher than the average US community of 21.84%: 26.74% of adults in Tarentum have at least a bachelor's degree.

The per capita income in Tarentum in 2022 was $29,022, 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 $116,088 for a family of four. However, Tarentum contains both very wealthy and poor people as well.

Tarentum is a somewhat ethnically-diverse borough. 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, Irish, Polish, and English.

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