| Official Name: | North Sea, New York |
| Settlement Type: | Hamlet and census-designated place |
| Pushpin Map: | New York |
| Pushpin Label Position: | bottom |
| Pushpin Label: | North Sea, New York |
| Mapsize: | 250x200px |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Suffolk |
| Area Footnotes: | [1] |
| Area Total Km2: | 31.33 |
| Area Land Km2: | 28.63 |
| Area Water Km2: | 2.70 |
| Area Total Sq Mi: | 12.10 |
| Area Land Sq Mi: | 11.05 |
| Area Water Sq Mi: | 1.04 |
| Population As Of: | 2020 |
| Population Total: | 5461 |
| Population Density Km2: | 190.74 |
| Population Density Sq Mi: | 494.03 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation M: | 5 |
| Elevation Ft: | 16 |
| Coordinates: | 40.9406°N -72.4031°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 11968 |
| Area Code: | 631 |
| Blank Name: | FIPS code |
| Blank Info: | 36-53561 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0958911 |
| Unit Pref: | Imperial |
| Subdivision Name3: | Southampton |
| Subdivision Type3: | Town |
| Pushpin Map Caption: | Location within the state of New York |
North Sea is a hamlet and census-designated place (CDP) in the Town of Southampton in Suffolk County, on the South Fork of Long Island, in New York, United States. The population was 4,458 at the 2010 census.[2]
It is served by the North Sea Fire District, which operates in adjacent areas as well.
According to the United States Census Bureau, North Sea has a total area of 31.3sqkm, of which 28.6sqkm is land and 2.7sqkm, or 8.61%, is water.[2] [3]
As of the census[4] of 2000, there were 4,493 people, 1,880 households, and 1,210 families residing in the CDP. The population density was 364.9sp=usNaNsp=us. There were 3,265 housing units at an average density of 265.2sp=usNaNsp=us. The racial makeup of the CDP was 94.70% White, 1.40% African American, 0.18% Native American, 0.96% Asian, 0.22% Pacific Islander, 1.65% from other races, and 0.89% from two or more races. Hispanic or Latino of any race were 5.30% of the population.
There were 1,880 households, out of which 26.3% had children under the age of 18 living with them, 52.4% were married couples living together, 8.7% had a female householder with no husband present, and 35.6% were non-families. 28.2% 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 2.39 and the average family size was 2.92.
In the CDP, the population was spread out, with 20.5% under the age of 18, 5.3% from 18 to 24, 28.4% from 25 to 44, 30.0% from 45 to 64, and 15.8% who were 65 years of age or older. The median age was 43 years. For every 100 females, there were 96.6 males. For every 100 females age 18 and over, there were 94.9 males.
The median income for a household in the CDP was $62,684, and the median income for a family was $71,168. Males had a median income of $53,879 versus $38,219 for females. The per capita income for the CDP was $34,668. About 4.5% of families and 7.2% of the population were below the poverty line, including 11.3% of those under age 18 and 7.7% of those age 65 or over.