Agency township
- County:
- Roberts County
- County Seat:
- No
- Area (mi²):
- 35.991
- State:
- South Dakota
Agency township is located in Roberts County, South Dakota. Agency township has a 2026 population of 311. Agency township is currently growing at a rate of 1.63% annually and its population has increased by 3.32% since the most recent census, which recorded a population of 301 in 2020.
The median age in Agency township is 27 years: 22.4 years for males, and 53 years for females. For every 100 females there are 120.7 males.