Black won gold in the women's balance-beam competition and then again in the floor exercise Wednesday to add her impressive haul.
The 19-year-old Halifax native won gold in the all-around, bronze in the vault and helped Canada earn silver in the team event.
Black, who nailed her balance-beam routine with a score of 15.050 at the highest difficulty level, has won at least one medal in each of the past four days of competition.
After her floor exercise routine that got her a score of 14.400, she blew kisses to the adoring crowd at Ricoh Coliseum as fans roared and waved Canadian flags.
Black put on a dominant performance at these Games that Canadian men's gymnast Scott Morgan called "an inspiration."
"She's done so, so well and I look up to her so much," said Morgan, who finished sixth in men's vault. "She's just the sweetest girl, and for her to come out here and do as well as she did, it's huge. It's huge for women's gymnastics in Canada."
Canadian teammate Victoria Woo won bronze on the balance beam with a score of 13.650, while Megan Skaggs of the United States got silver with a score of 14.050.
"I wasn't sure because beam is not my strongest event," Woo said. "I wasn't sure at the end. When I landed that dismount, I was like, 'Oh this is a good routine, but I'm not sure if it's a medal routine.'"
Cuba's Manrique Larudet won gold in the men's vault with a score of 15.125. American Donnell Whittenburg got silver and Brazilian Caio Souza bronze.
But Wednesday was a showcase for Black, who captured the 29th gold for Canada so far.
"It's an honour to be up there with Ellie," Woo said. "She's the best captain for Team Canada right now."