Sioux Lookout is a town in Northwestern Ontario, Canada. Located approximately 350 km (220 mi) northwest of Thunder Bay, it has a population of 5,838 people, an elevation of 383 m (1,257 ft), and its boundaries cover an area of 536 km2 (207 sq mi), of which 157 km2 (61 sq mi) is lake and wetlands. Known locally as the "Hub of the North", it is serviced by the Sioux Lookout Airport, Highway 72, and the Sioux Lookout railway station. According to a 2011 study commissioned by the municipality, health care and social services ranked as the largest sources of employment, followed by the retail trade, public administration, transportation and warehousing, manufacturing, accommodation and food services, and education.