Junius is a town in Seneca County, New York, United States. The population was 1,471 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 26.9 square miles (70 km), of which, 26.7 square miles (69 km) of it is land and 0.1 square miles (0.26 km) of it (0.41%) is water.
The west town line is the border of Ontario County, and the north town line is the border of Wayne County.
The New York State Thruway (Interstate 90) passes across the town. New York State Route 318 is an east-west highway in the town running parallel to the Thruway. New York State Route 414 is a north-south highway crossing a few arces in the far north-eastern part of Junius.
As of the census of 2010, there were 1,471 people, 543 households, and 381 families residing in the town. The population density was 55.1 people per square mile (21.2/km²). The racial makeup of the town was 97.6% White, 0.3% Black or African American, 0.3% Native American, 0.2% Asian, 0.0% Pacific Islander, 0.6% from other races, and 1.% from two or more races. Hispanic or Latino of any race were 2.5% of the population.
There were 543 households out of which 28.2% had children under the age of 18 living with them, 55.2% were married couples living together, 8.7% had a female householder with no husband present, and 29.8% were non-families. 21.5% of all households were made up of individuals and 7.0% 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 3.15.
In the town, the population was spread out with 29.3% under the age of 20, 5.5% from 20 to 24, 22.3% from 25 to 44, 29.2% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 39.4 years. For every 100 females, there were 103.5 males. For every 100 females age 18 and over, there were 100.4 males.
The median income for a household in the town was $45,350, and the median income for a family was $55,529. Males had a median income of $37,500 versus $34,625 for females. The per capita income for the town was $20.833. About 12.9% of families and 25.4% of the population were below the poverty line, including 45.7% of those under age 18 and 24.2% of those age 65 or over.
There were 608 housing units at an average density of 22.8 per square mile (8.8/km²). 10.7% of housing units were vacant.
There were 543 occupied housing units in the town. 445 were owner-occupied units (82.0%), while 98 were renter-occupied (18.0%). The homeowner vacancy rate was 2.0% of total units. The rental unit vacancy rate was 8.4%.