Monmouth is located in Jackson County, Iowa. Monmouth has a 2025 population of 554 . Monmouth 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 Monmouth is $74,394 with a poverty rate of 17.51%. The median age in Monmouth is 48.4 years: 40.6 years for males, and 52.9 years for females. For every 100 females there are 120.7 males.
Data after 2023 is projected based on recent change
The racial composition of Monmouth includes 96.39% White, and smaller percentages for Asian and multiracial populations.
White (96.39%)
Two or more races (3.07%)
Asian (0.54%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 534 | 96.39% |
| Two or more races | 17 | 3.07% |
| Asian | 3 | 0.54% |
Married
Widowed
Divorced
Separated
Never Married
Monmouth's average per capita income is $67,898. Household income levels show a median of $56,000. The poverty rate stands at 17.51%.
Name | Median | Mean |
|---|---|---|
| Married Families | $89,167 | - |
| Families | $85,577 | $85,846 |
| Households | $56,000 | $74,394 |
| Non Families | $19,815 | $36,015 |
Average Income
Median Household Income
Poverty Rate