Decker is a town located in Knox County, Indiana. Decker has a 2026 population of 198. Decker is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 198 in 2020.
The median age in Decker is 49.9 years: 45 years for males, and 53.3 years for females. For every 100 females there are 112.2 males.
Data after 2023 is projected based on recent change
Overall: 49.9 years
Female: 53.3 years
Male: 45 years
There are 156 adults, (38 of whom are seniors) in Decker.
Female: 82 (47.1%)
Male: 92 (52.9%)
The racial composition of Decker includes 98.28% White, and smaller percentages for Two or more races and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 171 | 98.28% |
| Two or more races | 3 | 1.72% |