Northam said he would not resign on Saturday morning, according to the Virginia Democratic party.
Joan Naidorf, whose husband's page is opposite Northam's in the yearbook, said she was surprised the photos are only now coming out, given Northam's stature in Virginia politics.
Northam, 59, a Democrat, did not say whether he was the man in blackface or the one in the Klan robe.
A photo of Virginia Gov. Ralph Northam that surfaced Friday has folks in the Commonwealth State, and those around the country, wondering if he'll resign.
Though his spokeswoman, Northam said his words were taken out of context, and were only meant to apply if a woman in dire circumstances went into labor.
The reversal is a direct contradiction to what Northam said on Friday evening, when he released a statement saying that he was in the photo.
That certainty had apparently dissolved by Saturday, when Northam was reportedly making calls to obtain more information about the photo and casting doubts about whether either of the people in the black-and-white image was actually him. Gov. Northam has lost all moral authority and should resign immediately.
When pressed by the caucus, Northam said he did not know which person he was in the photo - the person in blackface or the person in the KKK outfit.
"I hope the governor - whose career as an Army officer, pediatrician and public official has always manifested a commitment to justice and equality for all - now takes the time to listen to those he has hurt and reflect on how to move forward", Kaine said in a statement. If you even thought it was okay or you're somebody like Ralph Northam, then you owe people like me a huge apology before you get on your high horse and get upset... "If Governor Northam appeared in blackface or dressed in a KKK robe, he should resign immediately".
Northam was calling state lawmakers Saturday to try and gain support so he could remain in office, the Democrat said.
"I plan to continue to lead", he said.
Virginia Governor Ralph Northam has denied he was in a racist photo that appeared in his 1984 student yearbook page after initially apologising for it.
"It is because my memory of that episode is so vivid, that I truly do not believe I am in the picture in my yearbook", he said.
The Virginia Legislative Black Caucus, which comprises African Americans elected to the state legislature, described the images as "disgusting, reprehensible and offensive".
Julian Castro, who's the former San Antonio mayor and Obama cabinet member who has also made a 2020 Democratic presidential bid, also said the Virginia governor should resign.
'VA is an inclusive and diverse community-we won't put up with Ed Gillespie's racist rhetoric and fearmongering, ' Northam wrote in an October 2017 tweet.
When he ran for governor in 2017, Northam paid special attention to black churches, often attending two or three every Sunday.