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. For every 100 females there are 111.7 males.
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 (91.83%)
Two or more races (4.91%)
Black or African American (1.89%)
Other race (0.9%)
Asian (0.4%)
Native American (0.07%)
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