Walnut is located in Pottawattamie County, Iowa. Walnut has a 2025 population of 622 . Walnut 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 Walnut is $66,184 with a poverty rate of 12.22%. The median age in Walnut is 42.2 years: 39.9 years for males, and 42.4 years for females. For every 100 females there are 95.6 males.
Data after 2023 is projected based on recent change
The racial composition of Walnut includes 94.86% White, and smaller percentages for Black or African American and multiracial populations.
White (94.86%)
Two or more races (4.82%)
Black or African American (0.32%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 590 | 94.86% |
| Two or more races | 30 | 4.82% |
| Black or African American | 2 | 0.32% |
Married
Widowed
Divorced
Separated
Never Married
Walnut's average per capita income is $39,886. Household income levels show a median of $56,750. The poverty rate stands at 12.22%.
Name | Median | Mean |
|---|---|---|
| Married Families | $72,500 | - |
| Families | $62,188 | $70,499 |
| Households | $56,750 | $66,184 |
| Non Families | $30,000 | $53,327 |
Average Income
Median Household Income
Poverty Rate