
Fillmore
- County:
- Ventura County
- County Seat:
- No
- Area (mi²):
- 3.303
- State:
- California
Fillmore is a city located in Ventura County, California. Fillmore has a 2025 population of 17,650. Fillmore is currently growing at a rate of 1.32% annually and its population has increased by 6.98% since the most recent census, which recorded a population of 16,499 in 2020.
The average household income in Fillmore is $108,470 with a poverty rate of 4.85%. The median age in Fillmore is 36 years: 35.9 years for males, and 36.1 years for females.