New Jersey Monthly magazine ranked Essex Fells as its 10th best place to live in its 2008 rankings of the "Best Places To Live" in New Jersey.
According to the United States Census Bureau, the borough has a total area of 1.4 square miles (3.7 km²), all of it land.
Grover Cleveland Park, the seventh largest park in the Essex County park system, is a heavily wooded park covering in the western section of the county along the Caldwell-Essex Fells border.
There were 737 households out of which 40.0% had children under the age of 18 living with them, 75.3% were married couples living together, 5.3% had a female householder with no husband present, and 17.9% were non-families. 15.1% of all households were made up of individuals and 8.4% had someone living alone who was 65 years of age or older. The average household size was 2.93 and the average family size was 3.28.
In the borough the population was spread out with 29.7% under the age of 18, 3.6% from 18 to 24, 24.5% from 25 to 44, 27.5% from 45 to 64, and 14.7% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 96.9 males. For every 100 females age 18 and over, there were 94.6 males.
The median income for a household in the borough was $148,173, and the median income for a family was $175,000. Males had a median income of $100,000 versus $52,266 for females. The per capita income for the borough was $77,434. About 0.3% of families and 1.1% of the population were below the poverty line, including 0.9% of those under age 18 and 0.6% of those age 65 or over.
The Mayor of Essex Fells is Ed Abbot. Members of the Essex Fells borough council are Michael Cecere, Anne Denehy, Tom McCaffrey, George Peck, Jack Taylor and Pat Wahl.
On a local level, Essex Fells has elected a Republican mayor in every vote held since becoming a borough in 1902.
Students in public school for grades 7 - 12 attend the West Essex Regional School District, a regional school district serving students from four municipalities in western Essex County, New Jersey. Communities served by the district's schools are Essex Fells, Fairfield, North Caldwell and Roseland. Schools in the district (with 2005-06 enrollment data from the National Center for Education Statistics) are West Essex Junior High School (grades 7-9; 833 students) and West Essex High School (grades 10-12; 729 students).
In 1702, settlers purchased the 14,000 acre (57 km²) Horseneck Tract — so-called because of its irregular shape that suggested a horse's neck and head — from the Lenni Lenape Native Americans for goods equal to $325. This purchase encompassed much of western Essex County, from the Orange, or First Mountain in the Watchung Mountain range to the Passaic River.