Fillmore is a small city in Ventura County, California, United States, in the Santa Clara River Valley. In an agricultural area with rich, fertile soil, Fillmore has a historic downtown that was established when the Southern Pacific built the railroad through the valley in 1887. The population was 15,002 at the 2010 census, up from 13,643 at the 2000 census.

King & King Ranch is a 4th generation avocado and citrus farm on Chumash Land, near Fillmore,Ventura County, California. 8 varieties of avocados, over 20 varieties of citrus, plus pomegranates, persimmons, plums, herbs, and loads of other rare and exotic culinary delights are grown!

Fillmore Fish Hatchery raises trout for stocking Southern California waters. Surrounded by citrus and avocado orchards, the Fillmore area offers excellent fresh fruit vendors along Highway 126.