Llewellyn Park, New Jersey Demographics & Population 2026

A note before these figures: with a population of 560, Llewellyn Park's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Llewellyn Park is a small community located in New Jersey, within Essex County. The total population is 560. It ranks as the 606th most populous out of 700 Census-designated places in New Jersey.

Age Demographics

The median age in Llewellyn Park is 43.4 years. This is 8% higher than the state median of 40.1 years. Only 14.8% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in Llewellyn Park is $184,833. This is 78% higher than the state median of $103,556. It is also 129% higher than the national median of $80,734. The poverty rate stands at 2.0%. This is 80% lower than the state poverty rate of 9.7%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Llewellyn Park, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $1,140,000. Housing costs are 151% higher than the state median of $454,400. The home-value-to-income ratio of 6.2x suggests that housing affordability is a significant concern for many residents. 68.3% of occupied housing units are owner-occupied. This homeownership rate is 7% higher than the state average of 63.8%.

Race & Ethnicity

The largest racial or ethnic group in Llewellyn Park is White (non-Hispanic), making up 69.5% of the population. Hispanic or Latino residents account for 19.1%. The Black or African American population (2.0%) is well below the state average of 12.2%. The Asian population (4.6%) is well below the state average of 10.1%.

Education

60.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 38% higher than the state rate of 43.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample. Notably, 24.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Llewellyn Park, 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.