Mastic Beach is a medium-sized coastal town (i.e. on the ocean, a bay, or inlet) located in the state of New York. With a population of 14,199 people and four associated neighborhoods, Mastic Beach is the 133rd largest community in New York.

Telecommuters are a relatively large percentage of the workforce: 7.77% 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.

Mastic Beach is also nautical, which means that parts of it are somewhat historic and touch the ocean or tidal bodies of water, such as inlets and bays. Such areas are often places that visitors and locals go for waterfront activities or taking in the scenery.

In Mastic Beach, however, the average commute to work is quite long. On average, people spend 37.75 minutes each day getting to work, which is significantly higher than the national average.

The education level of Mastic Beach citizens is a little higher than the average for US cities and towns: 21.49% of adults in Mastic Beach have at least a bachelor's degree.

The per capita income in Mastic Beach in 2022 was $37,401, which is middle income relative to New York, and upper middle income relative to the rest of the US. This equates to an annual income of $149,604 for a family of four. However, Mastic Beach contains both very wealthy and poor people as well.

Mastic Beach is an extremely ethnically-diverse town. The people who call Mastic Beach home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Mastic Beach residents report their race to be White, followed by Black or African-American. Mastic Beach also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 17.62% of the town’s residents. Important ancestries of people in Mastic Beach include Italian, Irish, German, French, and English.

The most common language spoken in Mastic Beach is English. Other important languages spoken here include Spanish and German/Yiddish.