Three Mile Bay, New York Demographics & Population 2026

A note before these figures: with a population of 44, Three Mile Bay'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

Three Mile Bay is a small community located in New York, within Jefferson County. The total population is 44. It ranks as the 1285th most populous out of 1,289 Census-designated places in New York.

Age Demographics

The median age in Three Mile Bay is 41.5 years. This is 4% higher than the state median of 39.8 years.

Economy, Income & Housing

The median household income in Three Mile Bay is $34,464. This is 60% lower than the state median of $85,974. It is also 57% lower than the national median of $80,734. The poverty rate stands at 9.1%. This is 35% lower than the state poverty rate of 14.0%. The survey records no unemployed residents in Three Mile Bay, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $205,800. Housing costs are 51% lower than the state median of $423,800. The home-value-to-income ratio is 6.0x. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 84% higher than the state average of 54.4%.

Race & Ethnicity

Every resident counted in Three Mile Bay 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

0.0% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. 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 Three Mile Bay, New York 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 York state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,289 Census-designated places in New York. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.