In 2023, Johannesburg, CA had a population of 77 people with a median age of 53.2 and a median household income of N/A. Between 2022 and 2023 the population of Johannesburg, CA declined from 94 to 77, a −18.1% decrease and its median household income N/A from N/A to N/A, a N/A% N/A.
The 5 largest ethnic groups in Johannesburg, CA are Asian (Non-Hispanic) (100%), White (Non-Hispanic) (0%), Black or African American (Non-Hispanic) (0%), American Indian & Alaska Native (Non-Hispanic) (0%), and Native Hawaiian & Other Pacific Islander (Non-Hispanic) (0%).
None of the households in Johannesburg, 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.
79.2% of the residents in Johannesburg, CA are U.S. citizens.