Grundy County's estimated 2026 population is 12,350 with a growth rate of -0.09% in the past year according to the most recent United States census data. Grundy County is the 60th largest county in Iowa. The 2010 population was 12,464 and has seen a growth of -0.91% since that time.
Data after 2023 is projected based on recent change
Overall: 41.9 years
Female: 42.7 years
Male: 41 years
There are 9,479 adults, (2,600 of whom are seniors) in Grundy County.
Female: 6,253 (50.5%)
Male: 6,131 (49.5%)
The racial composition of Grundy County includes 95.1% White, and smaller percentages for Two or more races, other race, Black or African American, Asian, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 11,777 | 95.1% |
| Two or more races | 228 | 1.84% |
| Other race | 191 | 1.54% |
| Black or African American | 71 | 0.57% |
| Asian | 59 | 0.48% |
| Native American | 58 | 0.47% |
Grundy County's average per capita income is $51,929. Household income levels show a median of $87,205. The poverty rate stands at 6.52%.
Name | Median | Mean |
|---|---|---|
| Married Families | $113,936 | - |
| Families | $104,675 | $119,414 |
| Households | $87,205 | $101,039 |
| Non Families | $42,414 | $57,620 |
Average Income
Median Household Income
Poverty Rate