Facebook’s geo-targeting is generally accurate, but it’s not perfect—especially at more granular levels like state or city. If you're targeting California only but seeing impressions from other states, here’s what could be causing it,
How Facebook Geo-Targeting Works
Check your setting in Ads Manager under “Location” > “People in or recently in this location” — this could include travelers, commuters, or recent visitors.
Why You See Impressions Outside California
Targeting Mode Includes 'Recently In' or 'Traveling'
VPN or ISP Routing
Meta Reporting Lag or Mislabeling
What You Can Do
Set the location option to “People living in this location” to narrow delivery.
Run a breakdown report by Region or DMA to spot patterns and validate delivery.
Monitor performance by region to confirm actual conversions are California-based.