"Even though our data shows we are housing more people than ever, it is hard to be optimistic when that progress is overwhelmed by the number of people falling into homelessness," Hahn said.
The Los Angeles County numbers mirror tallies across California, as state officials struggle to address a lack of affordable housing. In addition, officials said, wages among lower-income residents have not kept up with the rising cost of living.
Some state lawmakers on Tuesday called for legislation capping rent increases on some tenants and encouraging the construction of more affordable housing.
"We're seeing folks who are working, have jobs and are homeless. They can't afford the rent. They can't afford to live in the communities in which they've grown up their entire life. And they're being displaced," said Assemblywoman Buffy Wicks, a Democrat from Oakland, where a countywide survey this year found a 43% increase in the homeless population over the last several years.
But California tenant legislation faces persistent opposition from landlords, and other major housing bills have already sputtered this legislative session.
The Los Angeles count found a 24% increase in homeless youth, defined as people under 25, and a 7% jump in people 62 or older.
Officials estimate about 29% of people experiencing homelessness in L.A. County are mentally ill or coping with substance abuse problems.
About two-thirds of all people on the streets are male, just under one-third are female, and about 2% identify as transgender or gender nonconforming.