The Fairmount area was part of the original 108-square-mile Onondaga Reservation lands which were acquired by the State of New York from the Onondagas in transactions that took place between 1793 and 1795. It was annexed to the town of Camillus in 1834. Prior to that date, census enumerations for Fairmount were included in the town of Onondaga census. The name originates from 1798 when engineer and politician James Geddes built his estate, called "Fair Mount" at the intersection of Genesee Road and Onondaga Road. The Brockway Tavern building, located on the northwest corner of West Genesee and Onondaga, formerly housed a tavern, motor inn, restaurants and later a funeral home, and now houses a credit union. The house was built c. 1808 and survives as one of the oldest structures in the hamlet. Previously known as Tyler or Jeromeville, the area became formally identified as Fairmount when its post office was renamed in 1846.. Fairmount was also a minor station on the Auburn and Syracuse Railroad and its successor railroads from 1838 to the end of the 19th century. The Fairmount Farm Colony, a working farm for the vocational training of young men with intellectual disabilities, was established by the Syracuse State School north of the hamlet in 1883. Farmland in the hamlet was developed into residential tracts from the 1890s through the 1990s. A large area of undeveloped land, formerly used for quarrying and a munitions factory in the 19th and early 20th centuries, borders Fairmount to the south at Split Rock. The Fair Mount mansion was demolished in 1929, although a stone carriage house from the estate survived until 2014. In 2007, Fairmount was 27th on Newsweek's "Best Places to Raise Your Kids" list.
Geography
Fairmount is located at . According to the United States Census Bureau, the CDP has a total area of, all land.
Demographics
As of the census of 2000, there were 10,795 people, 4,397 households, and 3,108 families residing in the CDP. The population density was 3,204.9 per square mile. There were 4,536 housing units at an average density of 1,346.7/sq mi. The racial makeup of the CDP was 95.75% White, 1.29% African American, 0.31% Native American, 1.35% Asian, 0.03% Pacific Islander, 0.29% from other races, and 0.99% from two or more races. Hispanic or Latino of any race were 1.07% of the population. There were 4,397 households, out of which 28.7% had children under the age of 18 living with them, 57.8% were married couplesliving together, 10.2% had a female householder with no husband present, and 29.3% were non-families. 25.5% of all households were made up of individuals, and 14.1% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 2.96. In the CDP, the population was spread out, with 23.1% under the age of 18, 5.6% from 18 to 24, 27.3% from 25 to 44, 22.8% from 45 to 64, and 21.2% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 89.1 males. For every 100 females age 18 and over, there were 84.4 males. The median income for a household in the CDP was $48,329, and the median income for a family was $56,686. Males had a median income of $39,780 versus $29,287 for females. The per capita income for the CDP was $21,806. About 2.5% of families and 3.7% of the population were below the poverty line, including 4.5% of those under age 18 and 4.8% of those age 65 or over.
