Madrid (/ˈmædrɪd/ MAD-rid) is a town in St. Lawrence County, New York, United States. The population was 1,735 at the 2010 census. The town is named after the capital of Spain.
According to the United States Census Bureau, the town has a total area of 53.6 square miles (139 km), of which, 52.9 square miles (137 km) of it is land and 0.7 square miles (1.8 km) of it (1.25%) is water.
The Grasse River flows through the town and through the population center of Madrid. Brandy Brook flows through the northwest part of Madrid.
The population center itself lies approximately halfway between the Towns of Potsdam and Waddington along New York State Route 345. Madrid is home to the Madrid Golf Course, a 9-hole public golf course located on County Route 14 near the heart of the population center. New York State Route 310 is an east-west highway passing south of Madrid village.
As of the census of 2000, there were 1,828 people, 638 households, and 458 families residing in the town. The population density was 34.5 people per square mile (13.3/km²). There were 763 housing units at an average density of 14.4 per square mile (5.6/km²). The racial makeup of the town was 97.43% White, 1.37% African American, 0.49% Native American, 0.11% Asian, 0.05% Pacific Islander, 0.05% from other races, and 0.49% from two or more races. Hispanic or Latino of any race were 0.93% of the population.
There were 638 households out of which 34.6% had children under the age of 18 living with them, 56.6% were married couples living together, 9.2% had a female householder with no husband present, and 28.1% were non-families. 21.3% of all households were made up of individuals and 10.0% had someone living alone who was 65 years of age or older. The average household size was 2.68 and the average family size was 3.04.
In the town, the population was spread out with 26.0% under the age of 18, 6.0% from 18 to 24, 29.6% from 25 to 44, 25.8% from 45 to 64, and 12.6% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 104.7 males. For every 100 females age 18 and over, there were 100.9 males.
The median income for a household in the town was $33,309, and the median income for a family was $40,625. Males had a median income of $32,120 versus $23,417 for females. The per capita income for the town was $13,720. About 14.4% of families and 20.2% of the population were below the poverty line, including 25.8% of those under age 18 and 12.9% of those age 65 or over.