Sienna Senior Living Inc., through its subsidiaries, provides senior living and long-term care (LTC) services in Canada. It operates through Retirement and LTC segments. The company offers a range of seniors' living options, including independent supportive and assisted living, memory care, and long-term care services, as well as specialized services comprising dementia care, continence management, skin and wound care, palliation, and end of life care; and provides management services. As of December 31, 2021, it owned and operated a total of 70 seniors' living residences comprising 27 retirement residences, 35 LTC residences, and eight seniors' living residences. The company was formerly known as Leisureworld Senior Care Corporation and changed its name to Sienna Senior Living Inc. in May 2015. Sienna Senior Living Inc. was founded in 1972 and is headquartered in Markham, Canada.