Fairfield, Idaho Demographics & Population 2026

A note before these figures: with a population of 499, Fairfield'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

Fairfield is a small community located in Idaho, within Camas County. The total population is 499. It ranks as the 146th most populous out of 232 Census-designated places in Idaho.

Age Demographics

The median age in Fairfield is 35.7 years. This is 4% lower than the state median of 37.3 years. With 31.7% of the population under 18, Fairfield has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Fairfield is $71,250. This is 8% lower than the state median of $77,800. It is also 12% lower than the national median of $80,734. The poverty rate stands at 2.2%. This is 79% lower than the state poverty rate of 10.6%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The survey records no unemployed residents in Fairfield, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $250,000. Housing costs are 40% lower than the state median of $418,600. The home-value-to-income ratio is 3.5x. 68.6% of occupied housing units are owner-occupied. This homeownership rate is 5% lower than the state average of 72.1%.

Race & Ethnicity

The largest racial or ethnic group in Fairfield is White (non-Hispanic), making up 68.7% of the population. Hispanic or Latino residents account for 17.4%.

Education

33.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 4% higher than the state rate of 31.8%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 72.1%.

Data Sources & Methodology

All demographic data for Fairfield, Idaho 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 Idaho state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 232 Census-designated places in Idaho. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.