Belle Terre is a village in the town of Brookhaven on the North Shore of Long Island in Suffolk County, New York, United States. The population was 792 at the 2010 census.
Belle Terre is located at 40°57′37″N 73°4′5″W / 40.96028°N 73.06806°W / 40.96028; -73.06806 (40.9628083, -73.068439).
According to the United States Census Bureau, the village has a total area of 0.9 square miles (2.3 km), all of it land.
The village occupies the northeastern half of the Mt. Misery peninsula and overlooks both Port Jefferson Harbor and the Long Island Sound. All access to the village over land is from the neighboring village of Port Jefferson, which serves as Belle Terre’s nearest commercial center and transit hub.
As of the census of 2010, there were 792 people, 286 households, and 224 families residing in the village. The racial makeup of the village was 92.6% White, 1.3% African American, 3.3% Asian, 1.3% from other races, and 1.5% from two or more races. Hispanic or Latino of any race were 3.9% of the population.
There were 286 households out of which 30.8% had children under the age of 18 living with them, 72.0% were married couples living together, 2.1% had a male householder with no wife present, 4.2% had a female householder with no husband present, and 21.7% were non-families. 15.7% of all households were made up of individuals and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.77 persons and the average family size was 3.10 persons.
As of the census of 2000, the population density was 952.3 people per square mile (369.2/km²). There were 297 housing units at an average density of 339.9 per square mile (131.8/km²).
In the village, the population was spread out with 24.8% under the age of 18, 3.6% from 18 to 24, 21.9% from 25 to 44, 36.5% from 45 to 64, and 13.2% who were 65 years of age or older, and the median age for the village was 45 years. For every 100 females, there were 100.5 males and for every 100 females age 18 and over, there were 98.1 males.
The median income for a household in the village was $132,155, and the median income for a family was $144,708. Males had a median income of $100,000 versus $50,156 for females. The per capita income for the village was $56,191. None of the families and 1.4% of the population were living below the poverty line, including none under the age of 18 and 3.2% of those over the age of 64.