Elmer is a very small borough located in the state of New Jersey. With a population of 1,377 people and three associated neighborhoods, Elmer is the 460th largest community in New Jersey. Elmer has a large stock of pre-World War II architecture, making it one of the older and more historic boroughs in the country.

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

The education level of Elmer citizens is substantially higher than the typical US community, as 30.59% of adults in Elmer have at least a bachelor's degree.

The per capita income in Elmer in 2022 was $43,044, 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 $172,176 for a family of four.

Elmer is a somewhat ethnically-diverse borough. 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 English, Irish, German, Italian, and Scots-Irish.

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