Donnelly is a city located in Valley County, Idaho. Donnelly has a 2026 population of 257. Donnelly is currently growing at a rate of 0.39% annually and its population has increased by 2.39% since the most recent census, which recorded a population of 251 in 2020.
The median age in Donnelly is 53.4 years: 53.4 years for males, and 54.3 years for females. For every 100 females there are 195.5 males.
Data after 2023 is projected based on recent change
Overall: 53.4 years
Female: 54.3 years
Male: 53.4 years
There are 182 adults, (12 of whom are seniors) in Donnelly.
Female: 66 (33.8%)
Male: 129 (66.2%)
The racial composition of Donnelly includes 97.44% White, and smaller percentages for Native American, other race and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 190 | 97.44% |
| Native American | 4 | 2.05% |
| Other race | 1 | 0.51% |