Penns Grove is a very small borough located in the state of New Jersey. With a population of 4,921 people and five associated neighborhoods, Penns Grove is the 319th largest community in New Jersey.

The citizens of Penns Grove are slightly less educated than the national average of 21.84% for the average city or town: 15.18% of adults in Penns Grove have a bachelor's degree or advanced degree

The per capita income in Penns Grove in 2022 was $19,275, which is low income relative to New Jersey and the nation. This equates to an annual income of $77,100 for a family of four. However, Penns Grove contains both very wealthy and poor people as well. Penns Grove also has one of the higher rates of people living in poverty in the nation, with 44.06% of its population below the federal poverty line.

Penns Grove is an extremely ethnically-diverse borough. The people who call Penns Grove home describe themselves as belonging to a variety of racial and ethnic groups. People of Hispanic or Latino origin are the most prevalent group in Penns Grove, accounting for 42.48% of the borough’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of Penns Grove residents report their race to be White, followed by Black or African-American. Important ancestries of people in Penns Grove include Irish, Italian, Polish, German, and English.

The most common language spoken in Penns Grove is English. Other important languages spoken here include Spanish and Italian.