Cotter is a city located in Louisa County, Iowa. Cotter has a 2026 population of 39. Cotter is currently declining at a rate of 0% annually and its population has decreased by -4.88% since the most recent census, which recorded a population of 41 in 2020.
The median age in Cotter is 60.7 years: 60.3 years for males, and 64.2 years for females. For every 100 females there are 72.2 males.
Data after 2023 is projected based on recent change
Overall: 60.7 years
Female: 64.2 years
Male: 60.3 years
There are 25 adults, (7 of whom are seniors) in Cotter.
Female: 18 (58.1%)
Male: 13 (41.9%)
The racial composition of Cotter includes 67.74% White, 32.26% other race, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 21 | 67.74% |
| Other race | 10 | 32.26% |