Elk River
- County:
- Clearwater County
- County Seat:
- No
- Area (mi²):
- 0.145
- State:
- Idaho
Elk River is a city located in Clearwater County, Idaho. Elk River has a 2026 population of 144. Elk River is currently declining at a rate of -1.37% annually but its population has increased by 2.86% since the most recent census, which recorded a population of 140 in 2020.
The median household income in Elk River is $54,904 with a poverty rate of 22.58%. The median age in Elk River is 59.8 years: 60 years for males, and 59.5 years for females. For every 100 females there are 175.6 males.