| Official Name: | Belleplain, New Jersey |
| Settlement Type: | Census-designated place |
| Pushpin Map: | USA New Jersey Cape May County#USA New Jersey#USA |
| Pushpin Label: | Belle Plain |
| Pushpin Map Caption: | Location in Cape May County##Location in New Jersey##Location in the United States |
| Pushpin Relief: | yes |
| Coordinates: | 39.2603°N -74.8737°W |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Cape May |
| Subdivision Type3: | Township |
| Subdivision Name3: | Dennis |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 19.04 |
| Area Total Sq Mi: | 7.35 |
| Area Land Km2: | 19.01 |
| Area Land Sq Mi: | 7.34 |
| Area Water Km2: | 0.03 |
| Area Water Sq Mi: | 0.01 |
| Area Water Percent: | 0.15 |
| Elevation Footnotes: | [2] |
| Elevation M: | 13 |
| Elevation Ft: | 43 |
| Population Footnotes: | [3] |
| Population Total: | 614 |
| Population As Of: | 2020 |
| Population Density Km2: | 32.30 |
| Population Density Sq Mi: | 83.66 |
| Timezone: | Eastern (EST) |
| Utc Offset: | −05:00 |
| Timezone Dst: | Eastern (EDT) |
| Utc Offset Dst: | −04:00 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 08270 - Woodbine[4] |
| Area Code: | 609 |
| Blank Name: | FIPS code |
| Blank Info: | [5] [6] [7] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 02629044[8] |
Belleplain is an unincorporated community and census-designated place (CDP)[9] located within Dennis Township in Cape May County, in the U.S. state of New Jersey.[10] As of the 2010 United States census, the CDP's population was 597.[11]
According to the United States Census Bureau, Belleplain had a total area of 7.405 square miles (19.178 km2), including 7.394 square miles (19.150 km2) of land and 0.011 square miles (0.029 km2) of water (0.15%).[5] [12]
The 2010 United States census counted 597 people, 218 households, and 171 families in the CDP. The population density was . There were 230 housing units at an average density of . The racial makeup was 95.48% (570) White, 0.67% (4) Black or African American, 0.34% (2) Native American, 0.17% (1) Asian, 0.00% (0) Pacific Islander, 1.01% (6) from other races, and 2.35% (14) from two or more races. Hispanic or Latino of any race were 3.18% (19) of the population.[11]
Of the 218 households, 26.6% had children under the age of 18; 61.0% were married couples living together; 11.0% had a female householder with no husband present and 21.6% were non-families. Of all households, 16.1% were made up of individuals and 8.3% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.02.[11]
21.8% of the population were under the age of 18, 7.7% from 18 to 24, 24.1% from 25 to 44, 31.5% from 45 to 64, and 14.9% who were 65 years of age or older. The median age was 41.8 years. For every 100 females, the population had 97.0 males. For every 100 females ages 18 and older there were 98.7 males.[11]
As with other parts of Dennis Township, the area is zoned to Dennis Township Public Schools (for grades K-8) and Middle Township Public Schools (for high school). The latter operates Middle Township High School.
Countywide schools include Cape May County Technical High School and Cape May County Special Services School District.