One Road
- County:
- Roberts County
- County Seat:
- No
- Area (mi²):
- 34.423
- State:
- South Dakota
One Road is located in Roberts County, South Dakota. One Road has a 2025 population of 62 . One Road is currently declining at a rate of 0% annually and its population has increased by 1.64% since the most recent census, which recorded a population of 61 in 2020.
The median age in One Road is 52.8 years: 0 years for males, and 0 years for females. For every 100 females there are 500.0 males.