Mountainside may refer to:
*the side of a
mountain
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited Summit (topography), summit area, and ...
*
Mountainside, New Jersey
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. As of the 2010 Un ...
, a borough
*Mountainside, a community in the city of
Burlington, Ontario
Burlington is a city in the Regional Municipality of Halton at the northwestern end of Lake Ontario in Ontario, Canada. Along with Milton to the north, it forms the western end of the Greater Toronto Area and is also part of the Hamilton met ...
, Canada
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Mountainside Hospital
Hackensack Meridian Health Mountainside, also known as Mountainside Hospital, is an acute-care hospital located in Montclair, New Jersey, United States. The hospital has 396 beds and serves Northeastern Essex County. A part of the Hackensack Univ ...
, Glen Ridge, New Jersey
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