Mountainside, New Jersey
Borough in Union County, New Jersey, US
About
Mountainside is a borough in Union County, in the U.S. state of New Jersey. The borough is located on a ridge in northern-central New Jersey, within the Raritan Valley and Rahway Valley regions in the New York metropolitan area. As of the 2020 United States census, the borough's population was 7,020, an increase of 335 (+5.0%) from the 2010 census count of 6,685, which in turn reflected an increase of 83 (+1.3%) from the 6,602 counted in the 2000 census.
Mountainside was incorporated as a borough on September 25, 1895, from portions of Westfield Township, based on the results of a referendum held the previous day.
Nearby
More to see within walking distance
Watchung Reservation
Largest nature reserve in Union County, New Jersey, US
0.8 mi away
Feltville Historic District
Historic district in New Jersey, United States
1.4 mi away
Deacon Andrew Hetfield House
Historic house in New Jersey, United States
0.6 mi away
Lake Surprise (Watchung Reservation, New Jersey)
Reservoir in Union County, New Jersey, U.S.
1.1 mi away
Miller-Cory House
Historic house in New Jersey, United States
1.4 mi awayGusmer Enterprises, Inc.
Notable place
1.0 mi awayPlaces to eat nearby
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Traveler reviews
Tickets & tours
Tickets and tours for Mountainside, New Jersey
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