“Due to California's diversity and because of its role as the primary gateway state for immigration, California will not age as rapidly in the coming 20 years as many other states,” the report said.
The percentage of women in the state will continue to slightly outnumber the percentage of men, due to longer female life expectancies, the report said.
California's population is expected to hit 50 million in 2049, from about 38 million today, led by steady growth in Southern California. Demographers predict 13 counties will have populations of 1 million or more people by 2060, with Fresno, Kern, San Joaquin and Ventura counties joining those ranks.
Riverside County is expected to add about 2 million people by 2060, more than any other county, becoming the second most populous county in the state with 4.2 million people, slightly ahead of San Diego County.
Los Angeles County is expected to have 11.6 million people by 2060.
The report relied on data from the U.S. Census Bureau, California Department of Public Health vital statistics and surveys of county planning experts and regional government councils.