Waterloo is a village in Seneca County, New York, United States. The population was 5,171 at the 2010 census and is now the most populated village in Seneca County. The village is named after the Waterloo in Belgium, where Napoleon was defeated. It is the primary county seat of Seneca County, with the other being Ovid as part of a two-shire system established in 1822. Most of the county administrative offices are located in the village. Therefore, many political sources only list Waterloo as the county seat.
Waterloo is located at 42°54′13″N 76°51′34″W / 42.90361°N 76.85944°W / 42.90361; -76.85944 (42.903697, -76.859517).
According to the United States Census Bureau, the village has a total area of 2.2 square miles (5.6 km²), of which, 2.1 square miles (5.4 km²) of it is land and 0.1 square miles (0.2 km²) of it (3.24%) is water.
The Seneca River/Cayuga-Seneca Canal pass through the village, linking the area to the Erie Canal system.
US Route 20, conjoined with New York State Route 5, intersects New York State Route 96 in the village.
The largest active landfill in New York State, Seneca Meadows, is northeast of Waterloo in the town of Seneca Falls.
As of the census of 2010, there were 5,171 people, 2,039 households, and 1,323 families residing in the village. The population density was 2,462.4 people per square mile (957.6/km²). The racial makeup of the village was 96.6% White, 1.1% Black or African American, 0.0% Native American, 0.4% Asian, 0.0% Pacific Islander, 0.2% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 2.2% of the population.
There were 2,039 households out of which 28.0% had children under the age of 18 living with them, 43.8% were married couples living together, 14.9% had a female householder with no husband present, and 35.1% were non-families. 29.1% of all households were made up of individuals and 12.8% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.88.
In the village, the population was spread out with 24.5% under the age of 20, 6.1% from 20 to 24, 22.8% from 25 to 44, 26.3% from 45 to 64, and 20.4% who were 65 years of age or older. The median age was 42.3 years. For every 100 females, there were 86.5 males. For every 100 females age 18 and over, there were 84.2 males.
The median income for a household in the village was $48,214, and the median income for a family was $65,709. Males had a median income of $43,393 versus $27,328 for females. The per capita income for the village was $23,777. About 5.5% of families and 10.6% of the population were below the poverty line, including 11.3% of those under age 18 and 5.9% of those age 65 or over.
There were 2,164 housing units at an average density of 1,030.5 per square mile (400.7/km²). 5.8% of housing units were vacant.
There were 2,039 occupied housing units in the village. 1,424 were owner-occupied units (69.8%), while 615 were renter-occupied (30.2%). The homeowner vacancy rate was 1.4% of total units. The rental unit vacancy rate was 7.5%.