Jordan Tannahill (born May 19, 1988) is a Canadian writer and director. His novels and plays have been translated into twelve languages, and honoured with a number of prizes including two Governor General's Literary Awards. He is author of the play Prince Faggot, and the novel The Listeners, which was shortlisted for the 2021 Giller Prize, and adapted into a limited series for the BBC.

Tannahill has been described as "the enfant terrible of Canadian Theatre" by Libération and The Walrus, and "one of Canada's leading writers" by Helen Shaw in The New Yorker. In 2019, CBC Arts named Tannahill as one of sixty-nine LGBTQ Canadians, living or deceased, who has shaped the country's history.

Tannahill was born and raised in Ottawa, where he attended Canterbury High School. He moved to Toronto at the age of eighteen, and began making short films and staging experimental plays, often with non-traditional collaborators like night-shift workers, frat boys, preteens, and employees of Toronto's famed Honest Ed's discount emporium. In his early twenties, he made several photographic and video works with artist Nina Arsenault. After living in Toronto for ten years, Tannahill moved to London in 2016, where he became active in the city's kink scene.

In 2012, Tannahill and his then-boyfriend William Ellis converted a former barbershop in Toronto's Kensington Market into Videofag, a small, multi-arts space that functioned variously as a gallery, cinema, and performance venue. Over the four years of its existence, Videofag became a hub for queer counterculture in Toronto.

Tannahill's debut novel, Liminal, published in 2018, is a work of autofiction which follows the author as he reckons with the nature of consciousness and the abject, precipitated by the sight of his mother's sleeping - or possibly dead - body. In her review of the novel, Martha Schabas of The Globe and Mail wrote "Tannahill's lushly intelligent debut... captures something illuminating and undefinable about the present moment; it speaks in the code and cadences of the late 2010s and paints an incisive portrait of the demographic we call millennial". In Le Devoir, Anne-Frédérique Hébert-Dolbec called the novel "a prodigious odyssey that tests the limits of reason and materiality." Liminal won the 2021 Prix des Jeunes Libraires.

The Listeners, published in 2021, follows Claire Devon, a woman whose life and beliefs are irrevocably altered after she starts hearing The Hum. The book made the Canadian national bestsellers list, and was shortlisted for the 2021 Giller Prize. In their citation, the Giller jury called the novel "a masterful interrogation of the body, as well as the desperate violence that undergirds our lives in the era of social media, conspiracies, isolation and environmental degradation."

The Listeners began as a story written for a new opera by composer Missy Mazzoli and librettist Royce Vavrek, which premiered at the Norwegian National Opera in 2022, directed by Lileana Blain-Cruz. Zachary Woolfe in the New York Times named the production one of the Best Classical Performances of 2024, calling it "the unmissable opera of the season", while Alex Ross of The New Yorker called it "mesmerizing" and declared Mazzoli "a once-in-a-generation magician of the orchestra."

Tannahill adapted his novel into a limited series, produced by Element Pictures for the BBC, directed by Janicza Bravo and starring Rebecca Hall. The series premiered at the 2024 Toronto International Film Festival, and aired to critical acclaim on BBC on November 19, 2024.