The 5 largest ethnic groups in Newcastle, CA are White (Non-Hispanic) (76.8%), White (Hispanic) (12.2%), Two+ (Non-Hispanic) (4.27%), Two+ (Hispanic) (2.26%), and Black or African American (Non-Hispanic) (1.38%).
None of the households in Newcastle, CA reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
98.9% of the residents in Newcastle, CA are U.S. citizens.