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. Much of the housing stock in Elmer was built prior to World War II, making it one of the older and more historic boroughs in the country.

Telecommuters are a relatively large percentage of the workforce: 10.49% 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.

Being a small borough, Elmer does not have a public transit system used by locals to get to and from work.

The overall education level of Elmer is somewhat higher than in the average US city of 21.84%: 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.