
Marysville
- County:
- Yuba County
- County Seat:
- Yes
- Area (mi²):
- 3.464
- State:
- California
Marysville is a city located in Yuba County, California. Marysville has a 2025 population of 12,556. It is also the county seat of Yuba County. Marysville is currently declining at a rate of -0.47% annually and its population has decreased by -2.3% since the most recent census, which recorded a population of 12,851 in 2020.
The average household income in Marysville is $80,724 with a poverty rate of 22.53%. The median age in Marysville is 33 years: 28.7 years for males, and 39.1 years for females.