Mount Arlington
What’s happening
Weather
Forecast →Upcoming events
Put the next local happening — a market, a meeting, a concert — on the map.
Local news
Headlines via Google News · Articles belong to their publishers.
The Mount Arlington album
Outdoors in Mount Arlington
Parks & trails →Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
About Mount Arlington
Borough in Morris County, New Jersey, USMount Arlington is a borough in western Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 5,909, an increase of 859 (+17.0%) from the 2010 census count of 5,050, which in turn reflected an increase of 387 (+8.3%) from the 4,663 counted in the 2000 census. The borough is located on the southeast shore of Lake Hopatcong, New Jersey's largest lake and a major recreational resource. Mount Arlington is home to the Lake Hopatcong Yacht Club.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
How Mount Arlington ranks
All →Town numbers
Housing in Mount Arlington
The median sale price was $512,000 in May 2026.
A seller's market
Safety in Mount Arlington
Safety Grade A+
Mount Arlington reports less crime per resident than 97% of the U.S. towns and cities we grade.
Health in Mount Arlington
Compared with New Jersey
of 32 measures CDC estimates. The other 16 are too close to call.
What stands out
Care nearby
Schools in Mount Arlington
All Mount Arlington schools →School Grade B-
The public schools Mount Arlington’s kids attend trail 54% of New Jersey’s districts on state tests. Among towns with similar incomes, they sit near the middle.
School data from the U.S. Department of Education (NCES, EDFacts). The School Grade is our own summary of state test results, graded within NJ. Ratings are from neighbors.
Where Mount Arlington is
Explore map →Imported town boundary