Sand Lake is a town in Rensselaer County, New York, United States. As of the 2010 census, the town had a population of 10,135. The town is in the south-central part of the county. Sand Lake is east of Albany, New York.
According to the United States Census Bureau, the town has a total area of 36.2 square miles (94 km), of which, 35.2 square miles (91 km) of it is land and 0.9 square miles (2.3 km) of it (2.63%) is water.
As of the census of 2010, there were 8,530 people, 3,009 households, and 2,229 families residing in the town. The population density was 226.9 people per square mile (87.6/km²). There were 3,277 housing units at an average density of 93.1 per square mile (35.9/km²). The racial makeup of the town was 96.4% Non Hispanic White, 0.4% African American, 0.11% Native American, 0.50% Asian and 1.1% from two or more races. Hispanic or Latino origin were 1.5% of the population. Ancestries: German (25.2%), Irish (22.6%), English (14.6%), Italian (13.8%), French (8.9%), Polish (6.1%).
There were 3,009 households out of which 37.1% had children under the age of 18 living with them, 58.6% were married couples living together, 11.8% had a female householder with no husband present, and 25.9% were non-families. 20.6% of all households were made up of individuals and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 3.08.
In the town, the population was spread out with 26.6% under the age of 18, 6.1% from 18 to 24, 28.6% from 25 to 44, 28.1% from 45 to 64, and 10.6% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 95.7 males. For every 100 females age 18 and over, there were 93.7 males.
The median income for a household in the town was $77,372, and the median income for a family was $97,009. Males had a median income of $67,132 versus $48,321 for females. The per capita income for the town was $36,103. The Median household income for White households is $75,474 compared to $2,157,374 for Asian households and $223,858 for African American households. About 6.7% of families and 7.7% of the population were below the poverty line, including 6.3% of those under age 18 and 10.3% of those age 65 or over.