Fairfield is located in Jefferson County, Iowa. Fairfield has a 2025 population of 277 . It is also the county seat of Jefferson County . Fairfield is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The average household income in Fairfield is $145,930 with a poverty rate of 0.72%. The median age in Fairfield is 33.3 years: 26.9 years for males, and 39.8 years for females. For every 100 females there are 138.8 males.
Data after 2023 is projected based on recent change
The racial composition of Fairfield includes 96.39% White, and smaller percentages for and multiracial populations.
White (96.39%)
Two or more races (3.61%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 267 | 96.39% |
| Two or more races | 10 | 3.61% |
Married
Widowed
Divorced
Separated
Never Married
Fairfield's average per capita income is $52,143. Household income levels show a median of $77,083. The poverty rate stands at 0.72%.
Name | Median | Mean |
|---|---|---|
| Families | $126,000 | $178,477 |
| Married Families | $126,000 | - |
| Households | $77,083 | $145,930 |
| Non Families | $39,375 | $44,384 |
Average Income
Median Household Income
Poverty Rate