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About Lyon Mountain, New York

Lyon Mountain is a hamlet (and census-designated place) located in the Town of Dannemora in Clinton County, New York, United States. The population was 423 at the 2010 census.Lyon Mountain is in the western part of the town.The Lyon Mountain Correctional Facility, a minimum security prison, is located nearby.

News from Lyon Mountain

Lyon Mountain Facts

  • Population Total: 423
  • Square Miles: 10.2
  • Area Code: 518
  • Elevation: 1798
  • Postal Codes: 12952, 12955
  • Timezone: North American Eastern