Duncan, Nebraska Demographics & Population 2026

A note before these figures: with a population of 612, Duncan'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

Duncan is a small community located in Nebraska, within Platte County. The total population is 612. It ranks as the 185th most populous out of 583 Census-designated places in Nebraska.

Age Demographics

The median age in Duncan is 21.6 years. This is 42% lower than the state median of 37.2 years. With 43.5% of the population under 18, Duncan has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Duncan is $74,688. This is 2% lower than the state median of $76,475. It is also 7% lower than the national median of $80,734. The poverty rate stands at 1.4%. This is 87% lower than the state poverty rate of 10.6%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 1.5%. This is 51% lower than the state rate of 3.0%. The median home value is $162,500. Housing costs are 32% lower than the state median of $238,600. With a home-value-to-income ratio of just 2.2x, Duncan is one of the most affordable housing markets in the area. 95.6% of occupied housing units are owner-occupied. This homeownership rate is 44% higher than the state average of 66.5%.

Race & Ethnicity

Duncan has a predominantly White (non-Hispanic) population, comprising 89.0% of all residents. Hispanic or Latino residents account for 10.0%. The Asian population (0.2%) is well below the state average of 2.6%.

Education

13.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 61% lower than the state rate of 34.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.3%.

Data Sources & Methodology

All demographic data for Duncan, Nebraska 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 Nebraska state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 583 Census-designated places in Nebraska. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.