Grannis
- County:
- Polk County
- County Seat:
- No
- Area (mi²):
- 7.93
- State:
- Arkansas
Grannis is a city located in Polk County, Arkansas. Grannis has a 2026 population of 499. Grannis is currently declining at a rate of -0.6% annually but its population has increased by 0.6% since the most recent census, which recorded a population of 496 in 2020.