Hecla is a city located in Brown County, South Dakota. Hecla has a 2026 population of 180. Hecla is currently declining at a rate of -1.1% annually and its population has decreased by -7.22% since the most recent census, which recorded a population of 194 in 2020.
The median age in Hecla is 66 years: 66.1 years for males, and 65.5 years for females. For every 100 females there are 55.6 males.
Data after 2023 is projected based on recent change
Overall: 66 years
Female: 65.5 years
Male: 66.1 years
There are 175 adults, (99 of whom are seniors) in Hecla.
Female: 117 (64.3%)
Male: 65 (35.7%)
The racial composition of Hecla includes 84.62% White, 10.44% Asian, 4.95% other race, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 154 | 84.62% |
| Asian | 19 | 10.44% |
| Other race | 9 | 4.95% |