Columbia, New Jersey Demographics & Population 2026

A note before these figures: with a population of 174, Columbia'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

Columbia is a small community located in New Jersey, within Warren County. The total population is 174. It ranks as the 671st most populous out of 700 Census-designated places in New Jersey.

Age Demographics

The median age in Columbia is 55.5 years. This is 38% higher than the state median of 40.1 years. 10.9% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Columbia is $74,125. This is 28% lower than the state median of $103,556. It is also 8% lower than the national median of $80,734. The poverty rate stands at 9.5%. This is 2% lower than the state poverty rate of 9.7%. The survey records no unemployed residents in Columbia, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $334,800. Housing costs are 26% lower than the state median of $454,400. The home-value-to-income ratio is 4.5x. 90.9% of occupied housing units are owner-occupied. This homeownership rate is 42% higher than the state average of 63.8%.

Race & Ethnicity

Columbia has a predominantly White (non-Hispanic) population, comprising 96.5% of all residents. Hispanic or Latino residents account for 3.5%. The White (non-Hispanic) population is significantly higher than the state average (96.5% vs 50.9%). The Hispanic or Latino population (3.5%) is well below the state average of 22.5%.

Education

41.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 5% lower 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 95.6%.

Data Sources & Methodology

All demographic data for Columbia, 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.