Elmer is a borough in Salem County in the U.S. state of New Jersey. As of the 2010 United States Census, the borough's population was 1,395, reflecting an increase of 11 (+0.8%) from the 1,384 counted in the 2000 Census, which had in turn declined by 187 (-11.9%) from the 1,571 counted in the 1990 Census. It is the home of the annual Appel Farm Arts and Music Festival, which celebrated its 23rd year in 2012.
Elmer was incorporated as a borough by an act of the New Jersey Legislature on January 28, 1893, from portions of Pittsgrove Township and Upper Pittsgrove Township, based on the results of a referendum held four days earlier. The borough was named for Lucius Elmer a former judge who helped obtain a post office for the community during his service as Congressman.
Elmer is a dry town where alcohol cannot be sold.
According to the United States Census Bureau, the borough had a total area of 0.877 square miles (2.273 km2), including 0.865 square miles (2.241 km2) of land and 0.012 square miles (0.032 km2) of water (1.40%).
The borough borders Pittsgrove Township and Upper Pittsgrove Township.
The 2010 United States Census counted 1,395 people, 536 households, and 390.744 families in the borough. The population density was 1,612.3 per square mile (622.5/km2). There were 577 housing units at an average density of 666.9 per square mile (257.5/km2). The racial makeup of the borough was 94.05% (1,312) White, 2.15% (30) Black or African American, 0.57% (8) Native American, 0.79% (11) Asian, 0.00% (0) Pacific Islander, 1.29% (18) from other races, and 1.15% (16) from two or more races. Hispanic or Latino of any race were 3.15% (44) of the population.
The 536 households accounted 31.3% with children under the age of 18 living with them; 51.5% were married couples living together; 13.6% had a female householder with no husband present, and 27.1% were non-families. Of all households, 22.2% were made up of individuals, and 9.3% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.00.
In the borough, the population age was spread out with 22.8% under the age of 18, 8.3% from 18 to 24, 28.5% from 25 to 44, 26.5% from 45 to 64, and 14.0% who were 65 years of age or older.