Los Angeles County Population 2024 Population. 2023*, 2020, 2010, 2000 & 1990 census. Los angeles county would rank eleventh in population among the 50 u.s.
Between 2024 population estimates and population projections for 2070, los angeles county is projected to lose 10 percent of its population, or one million people. It is also the county seat of los angeles county.