Dunellen is a somewhat small borough located in the state of New Jersey. With a population of 8,176 people and two associated neighborhoods, Dunellen is the 250th largest community in New Jersey. Much of the housing stock in Dunellen was built prior to World War II, making it one of the older and more historic boroughs in the country.

Also of interest is that Dunellen has more people living here who work in computers and math than 95% of the places in the US.

Telecommuters are a relatively large percentage of the workforce: 7.51% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

Even though Dunellen is a smaller borough, it has many people who hop on public transportation – mostly the bus for their daily commute to work. Typically, these people are commuting to good jobs in the surrounding cities.

The education level of Dunellen citizens is substantially higher than the typical US community, as 29.93% of adults in Dunellen have at least a bachelor's degree.

The per capita income in Dunellen in 2022 was $37,189, which is low income relative to New Jersey, and upper middle income relative to the rest of the US. This equates to an annual income of $148,756 for a family of four. However, Dunellen contains both very wealthy and poor people as well.

Dunellen is an extremely ethnically-diverse borough. The people who call Dunellen 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 Dunellen, accounting for 45.04% of the borough’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of Dunellen residents report their race to be White, followed by Asian. Important ancestries of people in Dunellen include Italian, Irish, Polish, Egyptian, and English.

Foreign born people are also an important part of Dunellen's cultural character, accounting for 37.98% of the borough’s population.

The most common language spoken in Dunellen is English. Other important languages spoken here include Spanish and Arabic.