Greenwich (Warren County), New Jersey Demographics & Population 2026

Population Overview

Greenwich (Warren County) is a small community located in New Jersey, within Warren County. The total population is 2,679. It ranks as the 408th most populous out of 700 Census-designated places in New Jersey.

Age Demographics

The median age in Greenwich (Warren County) is 38.8 years. This is 3% lower than the state median of 40.1 years. With 30.7% of the population under 18, Greenwich (Warren County) has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Greenwich (Warren County) is $164,167. This is 59% higher than the state median of $103,556. It is also 103% higher than the national median of $80,734. The poverty rate stands at 2.1%. This is 79% lower than the state poverty rate of 9.7%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 7.3%. This is 16% higher than the state rate of 6.3%. The median home value is $468,400. Housing costs are 3% higher than the state median of $454,400. With a home-value-to-income ratio of just 2.9x, Greenwich (Warren County) is one of the most affordable housing markets in the area. 99.2% of occupied housing units are owner-occupied. This homeownership rate is 55% higher than the state average of 63.8%.

Race & Ethnicity

The largest racial or ethnic group in Greenwich (Warren County) is White (non-Hispanic), making up 47.3% of the population. Asian residents account for 16.8%. The Asian population is significantly higher than the state average (16.8% vs 10.1%).

Education

51.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 19% higher than the state rate of 43.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 98.9%. Notably, 20.3% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Greenwich (Warren County), New Jersey is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against New Jersey state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 700 Census-designated places in New Jersey. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.