They streamed into the streets around the country’s parliament in Beirut, as well as elsewhere across the country, despite calls for calm from politicians and dozens of arrests on Friday.
The demonstrators are demanding a sweeping overhaul of Lebanon’s political system, citing grievances ranging from austerity measures to poor infrastructure.
They have crippled main roads and threatened to topple the country’s fragile coalition government.
The current unity government has the backing of most Lebanese political parties, including Hezbollah.