Alden is a CDP located in McHenry County, Illinois. Alden has a 2026 population of 44. Alden is currently growing at a rate of 4.76% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The median age in Alden is 67.9 years: 68.6 years for males, and 67.6 years for females. For every 100 females there are 108.7 males.
Data after 2023 is projected based on recent change
Overall: 67.9 years
Female: 67.6 years
Male: 68.6 years
There are 48 adults, (32 of whom are seniors) in Alden.
Female: 23 (47.9%)
Male: 25 (52.1%)
The racial composition of Alden includes 79.17% White, 20.83% other race, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 38 | 79.17% |
| Other race | 10 | 20.83% |