San Diego County

El Cajon and the Rancho San Diego / Santee / La Mesa corridor hold the state's highest limited-English-proficiency Arabic-speaking share.

Arab ancestry (ACS est.): ~44,400
Arabic spoken at home: ~30,600
Limited English proficiency share: ~47.8% (highest in California)
Dominant dialect profile: Iraqi / Chaldean-majority plurality, highly refugee-origin