Hillside is a medium-sized township located in the state of New Jersey. With a population of 21,991 people and five associated neighborhoods, Hillside is the 89th largest community in New Jersey.

A relatively large number of people in Hillside telecommute to their jobs. Overall, about 7.92% of the workforce works from home. While this may seem like a small number, as a fraction of the total workforce it ranks among the highest in the country. 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 Hillside is that it can take a long time to commute to work. In Hillside, the average commute to work is 30.49 minutes, which is quite a bit higher than the national average. On the other hand, local public transit is widely used in the township, so leaving the car at home and taking transit is often a viable alternative. In addition, it is also a pedestrian-friendly township. Many of Hillside’s neighborhoods are dense enough and have amenities close enough together that people find it feasible to get around on foot.

For the size of the township, public transportation in Hillside is quite heavily used. Mostly, people who use it for their daily commute are taking the bus. For Hillside, the benefits are reduced air pollution and congestion on the highways.

The percentage of people in Hillside who are college-educated is somewhat higher than the average US community of 21.84%: 28.91% of adults in Hillside have at least a bachelor's degree.

The per capita income in Hillside in 2022 was $38,687, 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 $154,748 for a family of four. However, Hillside contains both very wealthy and poor people as well.

Hillside is an extremely ethnically-diverse township. The people who call Hillside home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Hillside residents report their race to be Black or African-American, followed by White. Hillside also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 25.86% of the township’s residents. Important ancestries of people in Hillside include Haitian, Portuguese, African, Brazilian, and Jamaican.

Foreign born people are also an important part of Hillside's cultural character, accounting for 36.93% of the township’s population.

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