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.

A relatively large number of people in Mastic Beach telecommute to their jobs. Overall, about 7.77% 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.

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. Quite often, nautical areas such as these attract visitors and locals who come to enjoy the scenery and various waterfront activities.

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 citizens of Mastic Beach are slightly better educated than the national average of 21.84% for all cities and towns, with 21.49% of adults in Mastic Beach having a bachelor's degree or advanced 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.