The crowd chanted "thanks for the bail out," mocking the federal government's bailout of banks and other financial institutions.
Demonstrators held signs and encouraged people to write their elected officials to stop what they call corporate greed.
"I'm one of the 99 percent being affected by Wall Street and their greed," said Leimert Park resident Nanette Carey. "I'm here with all my brothers and sisters. We're tired of it and we're not going to take it anymore."
The demonstration was organized by a group called Occupy Los Angeles. On its website, the group said it was standing in solidarity with Occupy Wall Street, the protest in New York now in its second week.
In New York, the Brooklyn Bridge was shut down in one direction after a protest near Wall Street spilled onto the roadway.
New York City police say about 400 protesters were arrested for illegally blocking the bridge. The lane has since reopened.