page_title: Mountainside, New Jersey
section_title: Government
hierarchical_section_title: Mountainside, New Jersey / Government
caption_attribution_description: English: Scene at a park near the Trailside Nature &amp; Science Center in Watchung, New Jersey
context_page_description: Mountainside is a borough in Union County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 6,685, reflecting an increase of 83 from the 6,602 counted in the 2000 Census, which had in turn declined by 55 from the 6,657 counted in the 1990 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.
  New Jersey Monthly magazine ranked Mountainside as its 16th best place to live in its 2008 rankings of the "Best Places To Live" in New Jersey, as well as eighth in the 2010 list.
caption: Nature path in Watchung Reservation.
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