Yaphank is a somewhat small town located in the state of New York. With a population of 5,974 people and two associated neighborhoods, Yaphank is the 278th largest community in New York. Much of the housing stock in Yaphank was built relatively recently. The construction of new real estate can often be taken as an indication that the local Yaphank economy is robust, and that jobs or other amenities are attracting an influx of new residents. This seems to be the case in Yaphank, where the median household income is $108,971.00.

A relatively large number of people in Yaphank telecommute to their jobs. Overall, about 7.61% 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.

In Yaphank, however, the average commute to work is quite long. On average, people spend 33.20 minutes each day getting to work, which is significantly higher than the national average.

The citizens of Yaphank are very well educated compared to the average community in the nation: 35.37% of adults in Yaphank have a bachelor's degree or even advanced degree.

The per capita income in Yaphank in 2022 was $54,448, which is upper middle income relative to New York, and wealthy relative to the rest of the US. This equates to an annual income of $217,792 for a family of four.

Yaphank is a somewhat ethnically-diverse town. The people who call Yaphank home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Yaphank residents report their race to be White, followed by Black or African-American. Yaphank also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 10.73% of the town’s residents. Important ancestries of people in Yaphank include German, Italian, Irish, Polish, and English.

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