Brookhaven is a somewhat small borough located in the state of Pennsylvania. With a population of 8,291 people and three associated neighborhoods, Brookhaven is the 146th largest community in Pennsylvania.

A relatively large number of people in Brookhaven telecommute to their jobs. Overall, about 11.20% 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.

The education level of Brookhaven citizens is very high relative to the national average among all cities (21.84%): 35.14% of adults in Brookhaven have a bachelor's degree or even advanced degree.

The per capita income in Brookhaven in 2022 was $45,743, which is wealthy relative to Pennsylvania, and upper middle income relative to the rest of the US. This equates to an annual income of $182,972 for a family of four.

Brookhaven is a somewhat ethnically-diverse borough. The people who call Brookhaven home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Brookhaven residents report their race to be White, followed by Black or African-American. Important ancestries of people in Brookhaven include Irish, Italian, German, English, and Polish.

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