Declo is a city located in Cassia County, Idaho. Declo has a 2025 population of 364. Declo is currently growing at a rate of 1.39% annually and its population has increased by 7.69% since the most recent census, which recorded a population of 338 in 2020.
The average household income in Declo is $68,633 with a poverty rate of 12.52%. The median age in Declo is 38 years: 43.3 years for males, and 29.7 years for females.
Data after 2023 is projected based on recent change
The racial composition of Declo includes 70.82% White, 8.37% other race, and smaller percentages for Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Other race
Black or African American
Native American
Asian
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 364 | 70.82% |
| Two or more races | 99 | 19.26% |
| Other race | 43 | 8.37% |
| Black or African American | 5 | 0.97% |
| Native American | 3 | 0.58% |
| Asian | 0 | 0% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Declo's average per capita income is $48,333. Household income levels show a median of $46,780. The poverty rate stands at 12.52%.
Name | Median | Mean |
|---|---|---|
| Married Families | $119,643 | - |
| Families | $85,938 | $96,992 |
| Households | $46,780 | $68,633 |
| Non Families | $45,353 | $34,585 |
Average Income
Median Household Income
Poverty Rate