Almost three quarters of those questioned said they believed Mr Johnson had lied, with one in eight saying that he did not lie.
Of the 2,748 people questioned, around a quarter were Conservative voters in 2019.
Just over 30 per cent say the PM should remain in his role. However, two-thirds of these were 2019 Conservative voters.
Despite this, YouGov’s poll states only 7 per cent Britons think the Prime Minister will resign, with more than eight in ten (83 per cent) believing that he will remain in his role.
The proportion who think that he will resign includes just 6 per cent of 2019 Conservative voters and 6 per cent of 2019 Labour voters.
When Britons were asked if they think the Prime Minister knowingly lied about whether or not he broke lockdown rules, three-quarters (74 per cent) said he did, with around one in eight (13 per cent) saying he did not.
Among 2019 Conservative voters, half (51 per cent) think Mr Johnson knowingly lied.
Mr Johnson has denied lying to MPs over the partygate scandal, but admitted it was not correct when he told Parliament the rules had been followed at all times.
The Prime Minister claimed to have been “vindicated” by Ms Gray’s inquiry into lockdown-busting events in No 10, even though he has been fined for attending the birthday party thrown for him in the Cabinet Room in June 2020.
He told MPs: “I am happy to set on the record now that when I said – I came to this House and said in all sincerity – the rules and guidance had been followed at all times, it was what I believed to be true.
“It was certainly the case when I was present at gatherings to wish staff farewell, and the House will note that my attendance at these moments – brief as it was – has not been found to be outside the rules.”