Marshall is a town in Oneida County, New York, United States. The population was 2,131 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 32.8 square miles (85 km), all of it land.
Part of the south town line is the border of Madison County, New York.
As of the census of 2000, there were 2,127 people, 786 households, and 579 families residing in the town. The population density was 64.8 people per square mile (25.0/km²). There were 829 housing units at an average density of 25.3 per square mile (9.8/km²). The racial makeup of the town was 98.54% White, 0.52% African American, 0.14% Asian, 0.05% from other races, and 0.75% from two or more races. Hispanic or Latino of any race were 0.80% of the population.
There were 786 households out of which 36.1% had children under the age of 18 living with them, 60.1% were married couples living together, 8.9% had a female householder with no husband present, and 26.3% were non-families. 21.9% of all households were made up of individuals and 7.8% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.16.
In the town, the population was spread out with 28.0% under the age of 18, 7.9% from 18 to 24, 29.0% from 25 to 44, 24.2% from 45 to 64, and 11.0% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 99.3 males. For every 100 females age 18 and over, there were 98.2 males.
The median income for a household in the town was $42,125, and the median income for a family was $47,214. Males had a median income of $31,150 versus $24,196 for females. The per capita income for the town was $19,133. About 6.8% of families and 10.1% of the population were below the poverty line, including 13.8% of those under age 18 and 7.0% of those age 65 or over.