Leech township is located in Wayne County, Illinois. Leech township has a 2026 population of 446. Leech township is currently growing at a rate of 0.22% annually but its population has decreased by -1.11% since the most recent census, which recorded a population of 451 in 2020.
The median age in Leech township is 47.3 years: 40.7 years for males, and 47.5 years for females. For every 100 females there are 204.5 males.
Data after 2023 is projected based on recent change
Overall: 47.3 years
Female: 47.5 years
Male: 40.7 years
There are 379 adults, (121 of whom are seniors) in Leech township.
Female: 156 (32.8%)
Male: 319 (67.2%)
The racial composition of Leech township includes 98.32% White, and smaller percentages for Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 467 | 98.32% |
| Asian | 8 | 1.68% |