Marquette is a city located in Clayton County, Iowa. Marquette has a 2025 population of 435 . Marquette is currently growing at a rate of 0.23% annually and its population has increased by 1.87% since the most recent census, which recorded a population of 427 in 2020.
The average household income in Marquette is $54,133 with a poverty rate of 19.68%. The median age in Marquette is 48.2 years: 50.8 years for males, and 44.8 years for females. For every 100 females there are 74.9 males.
Data after 2023 is projected based on recent change
The racial composition of Marquette includes 95.37% White, and smaller percentages for Asian and multiracial populations.
White (95.37%)
Two or more races (4.17%)
Asian (0.46%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 412 | 95.37% |
| Two or more races | 18 | 4.17% |
| Asian | 2 | 0.46% |
Married
Widowed
Divorced
Separated
Never Married
Marquette's average per capita income is $38,750. Household income levels show a median of $38,125. The poverty rate stands at 19.68%.
Name | Median | Mean |
|---|---|---|
| Families | $46,250 | $66,085 |
| Households | $38,125 | $54,133 |
| Non Families | $34,750 | $46,486 |
| Married Families | - | - |
Average Income
Median Household Income
Poverty Rate