The town was settled around 1723, but much of the area had to be abandoned during the French and Indian War. The early town was a region assigned by patent to various landowners. It was resettled again before 1794.
The town was established in 1796 from part of the town of German Flatts. In 1798, the northwest part of Frankfort was made part of the town of Deerfield.
The Balloon Farm was listed on the National Register of Historic Places in 1998.http://mohawkvalley-wiki.com/wp-content/uploads/2012/10/IMG_0686-1024x768.jpg 1024w" sizes="(max-width: 300px) 100vw, 300px" /
Hiram Cronk, the last surviving veteran of the War of 1812 at the time of his death, was born in Frankfort
According to the United States Census Bureau, the town has a total area of 37.3 square miles (96.7 km²), of which, 37.2 square miles (96.4 km²) of it is land and 0.1 square miles (0.3 km²) of it (0.29%) is water.
New York State Route 5S runs parallel to the Mohawk River. New York State Route 171 intersects NY-5S in Frankfort village.
Frankfort has a large Italian American population.
As of the census of 2000, there were 7,478 people, 2,997 households, and 2,091 families residing in the town. The population density was 200.9 people per square mile (77.6/km²). There were 3,185 housing units at an average density of 85.6 per square mile (33.0/km²). The racial makeup of the town was 97.93% White, 0.49% Black or African American, 0.13% Native American, 0.13% Asian, 0.16% from other races, and 1.15% from two or more races. Hispanic or Latinoof any race were 1.02% of the population.
There were 2,997 households out of which 30.9% had children under the age of 18 living with them, 55.1% were married couples living together, 10.5% had a female householder with no husband present, and 30.2% were non-families. 25.0% of all households were made up of individuals and 14.0% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 2.99.
In the town the population was spread out with 23.7% under the age of 18, 7.1% from 18 to 24, 27.7% from 25 to 44, 24.2% from 45 to 64, and 17.3% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 91.1 males. For every 100 females age 18 and over, there were 87.8 males.
The median income for a household in the town was $38,399, and the median income for a family was $43,594. Males had a median income of $30,423 versus $22,813 for females. The per capita income for the town was $16,719. About 7.5% of families and 9.2% of the population were below the poverty line, including 12.3% of those under age 18 and 10.3% of those age 65 or over.
Frankfort voted against the merger and will struggle to provide programs for their children in 2013.