Jonathan Bartley and Sian Berry have pledged to make the Green Party the “main opposition” to the Government after they were elected as co-leaders for the second time.
The pair won with 49% of the first preference votes – beating rivals Shahrar Ali and Rosi Sexton.
Amelia Womack was re-elected as deputy leader for a fourth term.
In interviews with the PA news agency following their re-election, the co-leaders said they were focused on the grassroots by electing more Green councils.
Ms Berry said: “I would like the Greens to be the main opposition to the Government – that is the argument that we are making now.