Diamond Beach, New Jersey Demographics & Population 2026

A note before these figures: with a population of 350, Diamond Beach'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

Diamond Beach is a small community located in New Jersey, within Cape May County. The total population is 350. It ranks as the 636th most populous out of 700 Census-designated places in New Jersey.

Age Demographics

The median age in Diamond Beach is 61.7 years. This is 54% higher than the state median of 40.1 years. Only 6.0% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in Diamond Beach is $125,357. This is 21% higher than the state median of $103,556. It is also 55% higher than the national median of $80,734. The ACS records no residents below the poverty line in Diamond Beach. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The unemployment rate is 7.3%. This is 16% higher than the state rate of 6.3%. The median home value is $696,700. Housing costs are 53% higher than the state median of $454,400. The home-value-to-income ratio is 5.6x. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 57% higher than the state average of 63.8%.

Race & Ethnicity

Every resident counted in Diamond Beach was recorded as White (non-Hispanic). A figure of exactly 100.0% reflects a survey sample too small to capture the community's full composition rather than a precise measurement.

Education

63.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 46% 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 97.6%. Notably, 37.1% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Diamond Beach, 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.