States · New Jersey · Somerset County

Green Knoll, New Jersey.

A community in Somerset County, with no city government of its own. Zillow publishes no home prices for it: see Somerset County’s.

Living in Green Knoll, Somerset County, New Jersey

Green Knoll, in Somerset County, had 6,594 people in the 2020 census. Half its households earn more than $165,227 a year and half less, against $140,374 across Somerset County; 3% of its people live below the poverty line. 79% of its homes are lived in by their owners and 21% are rented. Unemployment in Somerset County was 4.1% in August 2026, and the county had 1.0% more jobs in 2025 than the year before. The most residents work in schools and health care, then professional services.

People 6,594 in the 2020 census; median age 44.5
Household income $165,227 the median, give or take $33,580 · Somerset County: $140,374
Unemployment 4.1% Somerset County, August 2026; 5.0% a year before
Homes 79% lived in by their owners; 21% rented
  • 2,368households
  • 58%of adults have a degree
  • 3%below the poverty line
  • 29 mintypical commute
  • 29%work from home

What residents work in

  • Schools, hospitals and social care24%
  • Professional and business services18%
  • Manufacturing13%
  • Banks, insurance and property13%
  • Building trades8%
  • Media and telecoms5%

Employed residents by industry, from the Census survey. Somerset County had 192,374 jobs in 2025, 1.0% more than the year before (Bureau of Labor Statistics).

Weather through the year

Average daily high and low for each month: coldest in January, 39° and 19°; warmest in July, 86° and 62° 20° 40° 60° 80° J 39° 19° F M A M J J 86° 62° A S O N D
Average daily high and low for each month: coldest in January, 39° and 19°; warmest in July, 86° and 62° 20° 40° 60° 80° J 39° 19° F M A M J J 86° 62° A S O N D

Coldest in January, with highs near 39° and lows near 19°; warmest in July, with highs near 86° and lows near 62°. About 47 inches of rain and melted snow a year.

Average daily high and low, 1991–2020, at the Somerville Northwest weather station, 2 miles away (NOAA).

Largest workplaces in Green Knoll

  1. Somerset County Vocational and Technical School DistrictSchool district126FTE
  2. BridgewaterMail and parcel delivery50
  3. CellaresBiotechnology research and development laboratories or services in genetics50

Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 2 workplaces with 20 or more staff, 100 people in all. School districts come from the Common Core of Data (NCES, 2023–24); FTE marks full-time equivalent staff. Not listed: many offices and banks, which need not report to OSHA; military bases, whose staff OPM withholds; and, in about half the states, city and county governments.

Natural hazards

  1. Inland floodingRelatively high
  2. Winter weatherRelatively high
  3. Ice stormsRelatively moderate
  4. Strong windRelatively moderate
  5. LightningRelatively moderate
  6. Heat wavesRelatively moderate

FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Green Knoll’s census tracts, against the rest of the country; all of them together, relatively moderate. It is meant for planning, not a substitute for a local risk assessment or a flood map: FEMA’s index.

From the U.S. Census Bureau’s 2020 census and its American Community Survey (2020–2024 five-year estimates), and the Bureau of Labor Statistics. A survey, so each figure has a margin of error, and figures it is not sure of are left out. More on Somerset County.