Washington township
- County:
- Clark County
- County Seat:
- No
- Area (mi²):
- 35.536
- State:
- South Dakota
Washington township is located in Clark County, South Dakota. Washington township has a 2026 population of 88. Washington township is currently declining at a rate of 0% annually and its population has increased by 4.76% since the most recent census, which recorded a population of 84 in 2020.
The median household income in Washington township is $63,333 with a poverty rate of 1.9%. The median age in Washington township is 25.6 years: 50.3 years for males, and 21.5 years for females. For every 100 females there are 84.2 males.