Louise Penny CM (born 1958) is a Canadian author of mystery novels set in the Canadian province of Quebec centred on the work of francophone Chief Inspector Armand Gamache of the Sûreté du Québec. Penny's first career was as a radio broadcaster for the Canadian Broadcasting Corporation (CBC). After she turned to writing, she won numerous awards for her work, including the Agatha Award for best mystery novel of the year five times, including four consecutive years (2007–2010), and the Anthony Award for best novel of the year five times, including four consecutive years (2010–2013). Her novels have been published in 23 languages.

In 2013, she was made a Member of the Order of Canada "for her contributions to Canadian culture as an author shining a spotlight on the Eastern Townships of Quebec". In 2017 she was made a Member of the Order of Quebec.

For several years, Penny resisted selling the TV or movie rights to her books, afraid of losing creative control of her characters. However, when approached by PDM Entertainment and Attraction Images and offered a position as executive producer during film production, she changed her mind and agreed to sell them the rights to her first two novels. Still Life went into production in the fall of 2012, with British actor Nathaniel Parker cast as Chief Inspector Gamache. The movie aired on CBC TV in 2013. In September 2021, production of Three Pines began in Montreal and rural Quebec, starring Alfred Molina.