Norco
- County:
- Riverside County
- County Seat:
- No
- Area (mi²):
- 13.857
- State:
- California
Norco is a city located in Riverside County, California. Norco has a 2026 population of 25,400. Norco is currently declining at a rate of -0.23% annually but its population has increased by 0.01% since the most recent census, which recorded a population of 25,398 in 2020.