Underhill Flats, Vermont Demographics & Population 2026

A note before these figures: with a population of 434, Underhill Flats'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

Underhill Flats is a small community located in Vermont, within Chittenden County. The total population is 434. It ranks as the 84th most populous out of 179 Census-designated places in Vermont.

Age Demographics

The median age in Underhill Flats is 35.8 years. This is 17% lower than the state median of 43.1 years. Only 3.2% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in Underhill Flats is $65,625. This is 19% lower than the state median of $81,203. It is also 19% lower than the national median of $80,734. The poverty rate stands at 3.2%. This is 68% lower than the state poverty rate of 10.1%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Underhill Flats, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $326,900. Housing costs are 3% higher than the state median of $316,600. The home-value-to-income ratio is 5.0x. 53.6% of occupied housing units are owner-occupied. This homeownership rate is 27% lower than the state average of 73.2%.

Race & Ethnicity

Underhill Flats has a predominantly White (non-Hispanic) population, comprising 94.7% of all residents.

Education

31.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 28% lower than the state rate of 43.8%. 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.

Data Sources & Methodology

All demographic data for Underhill Flats, Vermont 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 Vermont state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 179 Census-designated places in Vermont. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.