In a statement, the Service Employees International Union Local 721 called the rally at the Kenneth Hahn Hall of Administration the “largest mobilization in the union’s history.”
Los Angeles County union workers, including employees in health care, library administration and public works are on the verge of a strike.
About 55,000 members of SEIU Local 721 say they’ll strike if the county doesn’t pay them more.
The union’s current labor contract with the county expires at midnight.
The campaign is organized by the Mobile Workers Alliance, a group backed by the Service Employees International Union.
The rally was organized by SEIU 721, a labor union representing Southern California public service workers, and was joined by drivers with Mobile Workers Alliance, a group of more than 15,000 drivers.
Tim Sandoval, a representative with Service Employees International Union, Local 721, said they desperately need a bump in per-mile rates.