Harmon township
- County:
- Roberts County
- County Seat:
- No
- Area (mi²):
- 61.501
- State:
- South Dakota
Harmon township is located in Roberts County, South Dakota. Harmon township has a 2026 population of 152. Harmon township is currently growing at a rate of 0.66% annually and its population has increased by 1.33% since the most recent census, which recorded a population of 150 in 2020.
The median household income in Harmon township is $142,083 with a poverty rate of 0%. The median age in Harmon township is 50.6 years: 57.1 years for males, and 48.2 years for females. For every 100 females there are 78.4 males.