Fairfield city, Idaho Demographics & Population 2026

Population Overview

Fairfield city is a small community located in Idaho. The total population is 519. It ranks as the 143rd most populous out of 234 cities and towns in Idaho.

Age Demographics

The median age in Fairfield city is 34.7 years. This is 6% lower than the state median of 37.1 years. With 34.9% of the population under 18, Fairfield city has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Fairfield city is $77,917. This is 4% higher than the state median of $74,636. Compared to the national median of $78,538, household income here is about average. The poverty rate stands at 1.9%. This is 82% 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 0.0%. This is 100% lower than the state rate of 3.7%. The median home value is $195,200. Housing costs are 48% lower than the state median of $376,000. With a home-value-to-income ratio of just 2.5x, Fairfield city is one of the most affordable housing markets in the area. 63.8% of occupied housing units are owner-occupied. This homeownership rate is 12% lower than the state average of 72.4%.

Race & Ethnicity

The largest racial or ethnic group in Fairfield city is White (non-Hispanic), making up 70.3% of the population. Hispanic or Latino residents account for 13.9%.

Education

35.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 15% higher than the state rate of 31.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 71.3%.

Data Sources & Methodology

All demographic data for Fairfield city, Idaho is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Idaho state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 234 Census-designated places in Idaho. For official data, visit data.census.gov.