City Detials

About the town

Mountainside is a borough in Union County, New Jersey, United States. 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.

Official website

https://www.mountainside-nj.com/

Calendar

https://www.mountainside-nj.com/calendar

Things to do in town

https://www.tripadvisor.com/Attractions-g46654-Activities-Mountainside_New_Jersey.html

Resident forum

https://www.tripadvisor.com/Attractions-g46654-Activities-Mountainside_New_Jersey.html

Important Phone numbers

Borough of Mountainside
908-232-2400
Hours of operation 8:30 am – 4:30 pm Monday – Friday

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