| Official Name: | Upper Stewartsville, New Jersey |
| Settlement Type: | Census-designated place |
| Pushpin Map: | USA New Jersey Warren County#USA New Jersey#USA |
| Pushpin Label: | Upper Stewartsville |
| Pushpin Map Caption: | Location in Warren County##Location in New Jersey##Location in the United States |
| Pushpin Relief: | yes |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Warren |
| Subdivision Type3: | Township |
| Subdivision Name3: | Greenwich |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.91 |
| Area Land Km2: | 0.91 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.35 |
| Area Land Sq Mi: | 0.35 |
| Area Water Sq Mi: | 0.00 |
| Area Water Percent: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 329 |
| Population Density Km2: | 363.43 |
| Population Density Sq Mi: | 940.00 |
| Timezone: | Eastern (EST) |
| Utc Offset: | −05:00 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −04:00 |
| Elevation Footnotes: | [2] |
| Elevation M: | 127 |
| Elevation Ft: | 417 |
| Coordinates Footnotes: | [3] [4] |
| Coordinates: | 40.7028°N -75.1194°W |
| Area Code: | 908 |
| Blank Name: | FIPS code |
| Blank Info: | [5] [6] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 02584036[7] |
Upper Stewartsville is an unincorporated community and census-designated place (CDP) located within Greenwich Township in Warren County, in the U.S. state of New Jersey, that was defined as part of the 2010 United States Census.[8] [9] [10] As of the 2010 Census, the CDP's population was 212.[11]
According to the United States Census Bureau, the CDP had a total area of 0.070 square miles (0.182 km2), all of which was land.[3]
The 2010 United States census counted 212 people, 76 households, and 58 families in the CDP. The population density was . There were 84 housing units at an average density of . The racial makeup was 97.17% (206) White, 0.94% (2) Black or African American, 1.42% (3) Native American, 0.00% (0) Asian, 0.00% (0) Pacific Islander, 0.00% (0) from other races, and 0.47% (1) from two or more races. Hispanic or Latino of any race were 2.36% (5) of the population.[11]
Of the 76 households, 36.8% had children under the age of 18; 56.6% were married couples living together; 11.8% had a female householder with no husband present and 23.7% were non-families. Of all households, 19.7% were made up of individuals and 9.2% had someone living alone who was 65 years of age or older. The average household size was 2.79 and the average family size was 3.12.[11]
26.4% of the population were under the age of 18, 10.4% from 18 to 24, 23.1% from 25 to 44, 29.2% from 45 to 64, and 10.8% who were 65 years of age or older. The median age was 40.1 years. For every 100 females, the population had 100.0 males. For every 100 females ages 18 and older there were 100.0 males.[11]