| Official Name: | North Great River, New York |
| Settlement Type: | Hamlet and census-designated place |
| Pushpin Map: | New York |
| Pushpin Label: | North Great River |
| Pushpin Map Caption: | Location within the state of New York. |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Suffolk |
| Area Footnotes: | [1] |
| Area Total Km2: | 6.16 |
| Area Land Km2: | 6.09 |
| Area Water Km2: | 0.06 |
| Area Total Sq Mi: | 2.38 |
| Area Land Sq Mi: | 2.35 |
| Area Water Sq Mi: | 0.03 |
| Population As Of: | 2020 |
| Population Total: | 4266 |
| Population Density Km2: | 700.32 |
| Population Density Sq Mi: | 1813.78 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation M: | 9 |
| Elevation Ft: | 30 |
| Coordinates: | 40.7622°N -73.175°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 11752 |
| Area Code: | 631 |
| Blank Name: | FIPS code |
| Blank Info: | 36-52078 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0958793 |
| Unit Pref: | Imperial |
| Subdivision Name3: | Islip |
| Subdivision Type3: | Town |
North Great River is a hamlet and census-designated place (CDP) in the Town of Islip, in Suffolk County, on Long Island, in New York, United States. The CDP population was 4,001 at the 2010 census.[2] The hamlet is served by the Islip Terrace Post Office (11752).
According to the United States Census Bureau, the CDP has a total area of 6.1km2, of which 6km2 is land and 0.1km2, or 0.99%, is water.[3]
As of the census[4] of 2000, there were 2,129 people, 1,156 households, and 996 families residing in the CDP. The population density was 1719.8sp=usNaNsp=us. There were 1,167 housing units at an average density of 510.8sp=usNaNsp=us. The racial makeup of this CDP was 97.73% White, 1.58% African American, 0.08% Native American, 1.25% Asian, 0.03% Pacific Islander, 0.27% from other races, and 1.09% from two or more races. Hispanic or Latino of any race were 1.31% of the population.
There were 1,156 households, out of which 41.3% had children under the age of 18 living with them, 73.2% were married couples living together, 8.9% had a female householder with no husband present, and 13.8% were non-families. 10.6% of all households were made up of individuals, and 4.3% had someone living alone who was 65 years of age or older. The average household size was 3.40 and the average family size was 3.64.
In the CDP, the population was spread out, with 27.9% under the age of 18, 7.1% from 18 to 24, 32.4% from 25 to 44, 22.2% from 45 to 64, and 10.4% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 98.1 males. For every 100 females age 18 and over, there were 96.3 males.
The median income for a household in the CDP was $96,000, and the median income for a family was $127,385. Males had a median income of $132,911 versus $41,270 for females. The per capita income for the CDP was $102,489. About 1.3% of families and 0.8% of the population were below the poverty line, including 2.3% of those under age 18 and 8.9% of those age 65 or over.
North Great River is located primarily within the East Islip Union Free School District, although a small portion of the northwestern corner of the hamlet is within the Central Islip Union Free School District.[5] Students who reside within the hamlet and attend public schools will go to school in one of these two districts, depending on where in the hamlet they live.