Fairfax is located in Linn County, Iowa. Fairfax has a 2025 population of 4,540. Fairfax 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 Fairfax is $169,721 with a poverty rate of 4.85%. The median age in Fairfax is 40.7 years: 39.9 years for males, and 41.3 years for females.
Data after 2023 is projected based on recent change
The racial composition of Fairfax includes 91.83% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
White (91.8%)
Two or more races (4.9%)
Black or African American (1.9%)
Other race (0.9%)
Asian (0.4%)
Native American (0.1%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 4,169 | 91.83% |
| Two or more races | 223 | 4.91% |
| Black or African American | 86 | 1.89% |
| Other race | 41 | 0.9% |
| Asian | 18 | 0.4% |
| Native American | 3 | 0.07% |
Married
Widowed
Divorced
Separated
Never Married
Fairfax's average per capita income is $62,070. Household income levels show a median of $130,065. The poverty rate stands at 4.85%.
Name | Median | Mean |
|---|---|---|
| Married Families | $147,500 | - |
| Families | $142,228 | $191,555 |
| Households | $130,065 | $169,721 |
| Non Families | $63,250 | $67,658 |
Average Income
Median Household Income
Poverty Rate