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These figures are household adoption (how many homes subscribe to broadband), from the Census ACS. They are not provider or technology availability — that FCC data layer is a later addition. Nothing here is address-specific.

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Internet Access in Diamond Bar, CA

18,005 households · Census ACS 5-year.

Broadband subscription
96%
California 93.5%
Any internet subscription
96.1%
No internet access
2.2%
California 4.6%
Households
18,005

Similar-size cities in California

Source: U.S. Census Bureau, American Community Survey 5-year, table B28002. Subscription adoption, not provider or speed availability; not address-specific.

Internet Access in Diamond Bar, CA | BroadbandAtlasUSA