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 an unusually large stock of pre-World War II architecture, making it one of the older and more historic boroughs.

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.

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.