Timmins is a city in northeastern Ontario, Canada, located on the Mattagami River. The city is the fourth-largest city in the Northeastern Ontario region with a population of 44,819 (2023). The city's economy is based on natural resource extraction. It is supported by industries related to lumbering, and to the mining of gold, zinc, copper, nickel, and silver. Timmins serves as a regional service and distribution centre.