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.

Telecommuters are a relatively large percentage of the workforce: 7.61% 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.

One downside of living in Yaphank is that it can take a long time to commute to work. In Yaphank, the average commute to work is 33.20 minutes, which is quite a bit higher than the national average.

The population of Yaphank is very well educated relative to most cities and towns in the nation, where the average community has 21.84% of its adult population holding a 4-year degree or higher: 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.