Ventura County

Simi Valley, CA Business Index

Simi Valley is a city in Ventura County with an estimated 124,861 residents as of 2025, down 1.2% since 2020. Simi Valley's business base is indexed below across 48 owner-operated industries.

Population (2025)
124,861
U.S. Census Bureau estimate
Change since 2020
-1.2%
2020–2025
Land area
41.5 sq mi
2023 Census Gazetteer
Density
3,006/sq mi
Residents per square mile

Population trend

Annual resident population estimates, U.S. Census Bureau Population Estimates Program.

YearPopulationYear over year
2020126,348n/a
2021125,834-0.41%
2022125,055-0.62%
2023125,123+0.05%
2024125,349+0.18%
2025124,861-0.39%

Simi Valley holds 15.0% of Ventura County’s 830,851 residents.

Industries in Ventura County

Simi Valley businesses compete in the Ventura County market. Establishment counts, employment and payroll below are reported at county level by the U.S. Census Bureau.

HVAC & PlumbingViewElectricalViewRoofingViewLandscapingViewPest ControlViewPool ServiceViewCommercial CleaningViewFlooringViewGlass & GlazingViewSeptic & WellViewAuto RepairViewAuto BodyViewCar WashViewTowingViewTruckingViewEquipment RentalViewDentalViewVeterinaryViewHome HealthViewPharmacyViewMedical PracticeViewOptometryViewAccountingViewInsurance AgencyViewIT & MSPViewStaffingViewEngineeringViewArchitectureViewLaw FirmViewSecurity ServicesViewPrintingViewSign ShopsViewMachine ShopsViewMetal FabricationViewPlasticsViewFood ManufacturingViewMillworkViewRestaurantsViewBakeriesViewLiquor StoresViewGyms & FitnessViewSalons & SpasViewLaundromatsViewDry CleaningViewFuneral HomesViewSelf StorageViewChildcareViewPet ServicesView

Nearby cities

Other indexed places in Ventura County and the surrounding area.

Oxnard199,651Thousand Oaks122,230San Buenaventura (Ventura)109,914Camarillo68,652Moorpark35,023Santa Paula31,774Port Hueneme20,987Fillmore16,937Ojai7,474
Data last refreshed from source on 2026-09-08.

Sources

  1. U.S. Census Bureau, Population Estimates Program (Vintage 2025). Subcounty resident population estimates. Retrieved 2026-09-08.
  2. U.S. Census Bureau, 2023 Gazetteer Files. Land area and internal point coordinates. Retrieved 2026-09-08.
  3. U.S. Census Bureau, ANSI/FIPS Place-to-County Relationship File Retrieved 2026-09-08.