Danby is a town in Tompkins County, New York, United States. The population was 3,329 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 53.8 square miles (139 km), of which, 53.6 square miles (139 km) of it is land and 0.2 square miles (0.52 km) of it (0.33%) is water.
The south town line is the border of Tioga County.
New York State Route 96B (Danby Road) is a north-south highway in the town.
Cayuga Inlet flows northward on the west side of Danby to Cayuga Lake, and Danby Creek flows eastward alongside NY-96B.
As of the census of 2010, there were 3,007 people, 1,187 households, and 830 families residing in the town. There were 1,264 housing units at an average density of 23.6 per square mile (9.1/km²). The racial makeup of the town as 93.65% White, 2.69% African American, 0.17% Native American, 1.06% Asian, 0.43% from other races, and 2.00% from two or more races. Hispanic or Latino of any race were 1.70% of the population.
There were 1,187 households out of which 33.8% had children under the age of 18 living with them, 56.6% were married couples living together, 8.7% had a female householder with no husband present, and 30.0% were non-families. 21.2% of all households were made up of individuals and 5.0% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 2.94.
In the town, the population was spread out with 24.5% under the age of 18, 6.7% from 18 to 24, 30.0% from 25 to 44, 28.9% from 45 to 64, and 9.9% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 103.5 males. For every 100 females age 18 and over, there were 98.2 males.
The median income for a household in the town was $50,348, and the median income for a family was $52,303. Males had a median income of $34,181 versus $30,136 for females. The per capita income for the town was $23,078. About 3.9% of families and 5.1% of the population were below the poverty line, including 5.0% of those under age 18 and 2.8% of those age 65 or over.