A Populus poll for The Times shows - in the first round of voting, Mr Johnson has 46 percent, while Ken Livingstone has 34 percent.
The Green party candidate Jenny Jones is in third place with 6 percent.
Brian Paddick the Liberal Democrat candidate has five percent, along with Siobhan Benita the Independent candidate.
UKIP's Lawrence Webb polls three percent, while the BNP's Carlos Cortiglia has one percent.
In his first in-depth interview before being newly re-elected, London's Mayor says he's keen to continue his mandate.
Boris Johnson has attended his 'signing in' ceremony at City Hall.
Ken Livingstone comments on election coverage and what the future holds.