Meridian
- County:
- Ada County
- County Seat:
- No
- Area (mi²):
- 37.618
- State:
- Idaho
Meridian is a city located in Ada County, Idaho. Meridian has a 2026 population of 139,740. Meridian is currently growing at a rate of 3.26% annually and its population has increased by 16.94% since the most recent census, which recorded a population of 119,496 in 2020.