The Labour Party leader had previously promised not to give interviews to the paper during his leadership campaign at a hustings in the city in January 2020.
The publication is widely boycotted in Liverpool due to its coverage of the aftermath of the Hillsborough disaster in 1989.
As a result, Sir Keir was met with a furious woman after giving a speech in the city on Monday, where he laid out the priorities for the next Labour government.
“I don’t know how you’ve got the guts to come to this city, after you’ve been interviewed and doing columns for The Sun newspaper, after the way we as a city were abused and the Hillsborough victims were abused by that paper,” said Audrey White.
Audrey White @RedRosa91940184 welcomed @Keir_Starmer to #Liverpool today & spoke for the many who are looking for a real alternative to the #ToryLiars rather than a Starmer mark 2 version of Tory #Austerity. #nhscrisis #CostOfLivingCrisis @UKLabour @bbcmerseyside #ItWasAScam pic.twitter.com/ZYrxjAGkM7
— Merseyside Pensioners Association (@MerseyPensioner) July 25, 2022