Mount Arlington is a somewhat small borough located in the state of New Jersey. With a population of 5,931 people and two associated neighborhoods, Mount Arlington is the 285th largest community in New Jersey.

Housing costs in Mount Arlington are among some of the highest in the nation, although real estate prices here don't compare to real estate prices in the most expensive communities in New Jersey.

Telecommuters are a relatively large percentage of the workforce: 15.58% 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.

One downside of living in Mount Arlington, however, is that residents on average have to contend with a long commute, spending on average 36.97 minutes every day commuting to work.

The education level of Mount Arlington ranks among the highest in the nation. Of the 25-and-older adult population in Mount Arlington, 48.84% have at least a bachelor's degree. The typical US community has just 21.84% of its adults holding a bachelor's degree or graduate degree.

The per capita income in Mount Arlington in 2022 was $50,876, which is middle income relative to New Jersey, and wealthy relative to the rest of the US. This equates to an annual income of $203,504 for a family of four. However, Mount Arlington contains both very wealthy and poor people as well.

Mount Arlington is a very ethnically-diverse borough. The people who call Mount Arlington home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Mount Arlington residents report their race to be White, followed by Black or African-American. Mount Arlington also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 18.76% of the borough’s residents. Important ancestries of people in Mount Arlington include Italian, Irish, German, English, and Polish.

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