You can get the most current census population data for all 58 california counties, sorted from the most populous counties in california to the least, according to the 2024. The counties of california are local arms of the state of california, described by the supreme court of california as agents (the county is merely a political subdivision of state government, exercising only the powers of the state, granted by the state…') and the property they hold is held on behalf of all the people of the state Ranking of california counties by population in 2024 updated on june 21, 2025 Based on the us census vintage data estimates, in 2024, the population for california was 39.43m Among all california counties, los angeles county had the highest population (9.76m), followed by san diego county (3.30m), and orange county (3.17m). Counties in incorporated places with population statistics, charts and maps.
County proportions of the state total result from changes in county population values for births, deaths, school enrollment, foreign and domestic migration, medical care and medical aid enrollments, and group quarters population. Alphabetical list of counties in california Demographics and population of california counties. California counties by population provide a detailed snapshot of how the total population of 39,538,223 residents in california spread into counties, based on the 2020 census data.
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