Clayton
- County:
- Custer County
- County Seat:
- No
- Area (mi²):
- 0.064
- State:
- Idaho
Clayton is a city located in Custer County, Idaho. Clayton has a 2026 population of 12. Clayton is currently declining at a rate of 0% annually and its population has increased by 9.09% since the most recent census, which recorded a population of 11 in 2020.