Nassau is located in Sioux County, Iowa. Nassau has a 2025 population of 2,066 . Nassau 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 Nassau is $116,643 with a poverty rate of 2.81%. The median age in Nassau is 31.4 years: 32.4 years for males, and 31.2 years for females. For every 100 females there are 104.2 males.
Data after 2023 is projected based on recent change
The racial composition of Nassau includes 84.03% White, and smaller percentages for other race, Asian, Black or African American, Native American and multiracial populations.
White (84.03%)
Two or more races (8.42%)
Other race (2.66%)
Asian (2.27%)
Black or African American (1.84%)
Native American (0.77%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,736 | 84.03% |
| Two or more races | 174 | 8.42% |
| Other race | 55 | 2.66% |
| Asian | 47 | 2.27% |
| Black or African American | 38 | 1.84% |
| Native American | 16 | 0.77% |
Married
Widowed
Divorced
Separated
Never Married
Nassau's average per capita income is $53,925. Household income levels show a median of $85,227. The poverty rate stands at 2.81%.
Name | Median | Mean |
|---|---|---|
| Married Families | $129,766 | - |
| Families | $121,625 | $143,367 |
| Households | $85,227 | $116,643 |
| Non Families | $52,981 | $60,142 |
Average Income
Median Household Income
Poverty Rate