Ada Blackjack (née Delutuk; May 10, 1898 – May 29, 1983) was an Iñupiaq woman who lived for two years as a castaway on the uninhabited Wrangel Island, north of Siberia.

Ada's father died of food poisoning when she was eight years old, and her mother sent her and her sister, Rita, to a Methodist mission school in Nome, Alaska.

Jordan was familiar with Ada's situation, so he mentioned to her that some men were recruiting Inuit to go with them on their Arctic expeditions across the Chukchi Sea to Wrangel Island.

While Jordan was not familiar with the purpose of the expedition, he believed that Ada, who spoke English and was an excellent seamstress, might be a good fit for the mission, which needed someone to sew fur clothing for the team.

[5] The team included five people: Blackjack, who had been hired as a cook and seamstress;[10] the American men Lorne Knight, Milton Galle, and Fred Maurer; and Allan Crawford.

[5] On January 28, 1923, three of the men finally attempted to cross the 90 mi (140 km) frozen Chukchi Sea to Siberia for help and food, leaving Blackjack and the ailing Knight behind.

[5] Blackjack survived in the extremely cold conditions for eight months, learning to hunt foxes, build boats, and sew parkas out of reindeer skin.

Except for her expedition salary and a few hundred dollars she had earned for the furs she trapped on Wrangel, Blackjack did not benefit from her ordeal and received no compensation from the books that were written about her.