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.

In 1769, the Spanish Portola expedition, first Europeans to see inland areas of California, came down the valley from the previous night's encampment near today's Rancho Camulos and camped in the vicinity of Fillmore on August 11.

Fray Juan Crespi, a Franciscan missionary travelling with the expedition, had previously named the valley Cañada de Santa Clara.

[8] Founded in 1887 upon the arrival of the Southern Pacific Rail line,[9] the city voted to incorporate in 1914,[10] after a vigorous campaign by local business owners and the Fillmore Herald.

No one in the community died or was injured, but over 200 buildings were damaged, including about one-fifth of the historical downtown that had been the center of numerous Hollywood films and TV shows.

[15] Fillmore sits at the foot of Topatopa Mountains in the Santa Clara River Valley, below San Cayetano peak in the Los Padres National Forest.

According to the United States Census Bureau, the city has a total area of 3.4 square miles (8.8 km2), 99.97% of it land and 0.03% of it water.

To a lesser extent, row crop farming and small industry and assembly are also present in and near Fillmore and in other parts of the Santa Clara River Valley.

In 2014, a plan was presented for a business park on the old Chevron refinery property east of Fillmore.

The Fillmore and Western Railway trains took tourists through the orchards for thirty years until it ceased operations in 2021.

[27] The bunkhouse contains many displays illustrating the history of Fillmore and the nearby communities of Bardsdale and Piru.

The City of Fillmore is an established municipality within Ventura County, founded in 1888 and incorporated on July 10, 1914.

Dave Wareham, 5 Patrol Sergeants, 2 Detectives, 35 regular deputies, 1 cadet and 1 dispatcher.

Fillmore is also served by three Sheriff's Store Front Locations, a Juvenile Liaison Program with the School District, Citizens Patrol Disaster Response Team, Fillmore Mountain Search and Rescue Team and Citizens Patrol.

The Fillmore Police Department has a Bike Patrol Unit, which consists of eight specially trained deputies.

Each year the Santa Clara Valley Station offers a Bike Rodeo for the youth in the community.

This unit is utilized for any specific crime concerns that are beyond the scope of normal patrol resources.

In August 2001, the City of Fillmore introduced its first traffic enforcement motorcycle, a BMW bike, which was purchased with technology grant funds from the State.

Fillmore is at the east end of the Ventura Intercity Service Transit Authority Highway 126 route that originates at the Pacific View Mall in Ventura, and operates along SR 126 to Saticoy, Santa Paula and Fillmore.

The dial-a-ride services in both cities, which for now are the only public transit option, will remain in operation after the bus routes start.

Veolia North America operates the City of Fillmore Wastewater Treatment Plant.

[33] While Rancho Camulos appears in the film Ramona (1910), Fillmore's State Fish Hatchery is featured in Susanna Pass (1949).

The January 4, 2007, episode of CSI entitled Leaving Las Vegas prominently featured old-town Fillmore as the fictional town of "Larkston, Nevada".