Alameda County

Union City, CA Business Index

Union City is a city in Alameda County with an estimated 65,282 residents as of 2025, down 6.6% since 2020. Union City's business base is indexed below across 48 owner-operated industries.

Population (2025)
65,282
U.S. Census Bureau estimate
Change since 2020
-6.6%
2020–2025
Land area
19.4 sq mi
2023 Census Gazetteer
Density
3,365/sq mi
Residents per square mile

Population trend

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

YearPopulationYear over year
202069,932n/a
202168,138-2.57%
202266,640-2.20%
202365,993-0.97%
202465,696-0.45%
202565,282-0.63%

Union City holds 4.0% of Alameda County’s 1,636,630 residents.

Industries in Alameda County

Union City businesses compete in the Alameda 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 Alameda County and the surrounding area.

Oakland440,838Fremont226,442Hayward157,113Berkeley121,911San Leandro85,353Livermore83,457Alameda76,876Pleasanton74,556Dublin71,602
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.