| Official Name: | Lyon Mountain, New York |
| Settlement Type: | Census-designated place & hamlet |
| Mapsize: | 260px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Clinton |
| Subdivision Type3: | Town |
| Subdivision Name3: | Dannemora |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 27.25 |
| Area Land Km2: | 27.23 |
| Area Water Km2: | 0.02 |
| Area Total Sq Mi: | 10.52 |
| Area Land Sq Mi: | 10.51 |
| Area Water Sq Mi: | 0.01 |
| Population As Of: | 2020 |
| Population Total: | 421 |
| Population Density Km2: | 15.46 |
| Population Density Sq Mi: | 40.05 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation M: | 548 |
| Elevation Ft: | 1798 |
| Coordinates: | 44.7289°N -73.9078°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 12952, 12955 |
| Area Code: | 518 |
| Blank Name: | FIPS code |
| Blank Info: | 36-43951 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0956192 |
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.[2]
The northern slopes of Lyon Mountain are in the southern part of the community, with the 3840feet summit to the south in the town of Saranac.
The Lyon Mountain Correctional Facility, a minimum security prison, was located in the community. The facility closed in 2011, and has been purchased by a Canadian who has mined sand for hydrofracking from the site.
The hamlet of Lyon Mountain is located at 44.7289°N -73.9078°W (44.728863, -73.907905).[3] According to the United States Census Bureau, the CDP has a total area of 26.3sqkm, all land.[2]
Lyon Mountain is on New York State Route 374, which leads east to Dannemora village and northwest to Chateaugay.
As of the census[4] of 2000, there were 458 people, 214 households, and 129 families residing in the hamlet. The population density was 45sp=usNaNsp=us. There were 234 housing units at an average density of 23.0/sq mi (8.9/km2). The racial makeup of the CDP was 95.85% White, 0.22% African American, 1.09% Native American, 0.22% Pacific Islander, and 2.62% from two or more races.
There were 214 households, out of which 22.0% had children under the age of 18 living with them, 47.2% were married couples living together, 8.9% had a female householder with no husband present, and 39.3% were non-families. 36.0% of all households were made up of individuals, and 22.9% had someone living alone who was 65 years of age or older. The average household size was 2.14 and the average family size was 2.72.
In the community, the population was spread out, with 18.3% under the age of 18, 5.7% from 18 to 24, 22.5% from 25 to 44, 30.6% from 45 to 64, and 22.9% who were 65 years of age or older. The median age was 46 years. For every 100 females, there were 93.2 males. For every 100 females age 18 and over, there were 85.1 males.
The median income for a household in the village was $25,000, and the median income for a family was $41,250. Males had a median income of $39,688 versus $20,250 for females. The per capita income for the CDP was $16,776. About 14.8% of families and 14.1% of the population were below the poverty line, including 21.7% of those under age 18 and 7.7% of those age 65 or over.
The hamlet is named after Nathaniel Lyon, who moved to the base of the mountain that also bears his name in 1803 and died circa 1850. Lyon was a relative of General Nathaniel Lyon (1818–1861).[5]
Republic Steel Corporation was one of the last major steel firms to use low-phosphorus Adirondack magnetites, operating the Chateaugay Ore & Iron Company from 1939 to 1967. The Chateaugay mine was one of the deepest commercial iron ore mines in the United States, with stopes as much as below the surface. Lyon Mountain's iron ore was considered the best in the industry and was the material of choice for John Roebling and Sons in the construction of the Brooklyn Bridge.[6] In later years, Roebling used Lyon Mountain ore in the construction of the George Washington Bridge and the Golden Gate Bridge.[6]
Lyon Mountain is a hamlet within the town of Dannemora. Public services and government affairs are administered by the town, which is governed by a board of councilors.
Japan Islanders are a team with the Empire Professional Baseball League and play out of Lyon Mountain Miners Baseball Field.