Elmer is a very small borough located in the state of New Jersey. With a population of 1,368 people and three associated neighborhoods, Elmer is the 460th largest community in New Jersey. Elmer has an unusually large stock of pre-World War II architecture, making it one of the older and more historic boroughs.

A relatively large number of people in Elmer telecommute to their jobs. Overall, about 10.49% 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.

Elmer is a small borough, and as such doesn't have a public transit system that people use to get to and from their jobs every day.

In terms of college education, Elmer is somewhat better educated than the 21.84% who have a 4-year degree or higher in the typical US community: 25.41% of adults 25 and older in the borough have at least a bachelor's degree.

The per capita income in Elmer in 2022 was $42,084, which is lower middle income relative to New Jersey, and upper middle income relative to the rest of the US. This equates to an annual income of $168,336 for a family of four.

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

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