Thunder Bay,Ontario

Thunder Bay (2006 census population 109,140), formerly the twin cities of Fort William and Port Arthur, is a city in and the seat of Thunder Bay District, Ontario, Canada. It is the most populous municipality in Northwestern Ontario, and the second most populous in Northern Ontario after Greater Sudbury. The census metropolitan area of Thunder Bay has a population of 122,907, and consists of the city of Thunder Bay, the municipalities of Oliver Paipoonge and Neebing, the townships of Shuniah, Conmee, O'Connor and Gillies, and the Fort William First Nation.

European settlement in the region began in the late 1600s with a French fur trading outpost on the banks of the Kaministiquia River.[5] The city was formed in 1970 by the merger of the cities of Fort William, Port Arthur and the geographic townships of Neebing and McIntyre. Its port forms an important link in the shipping of grain and other products from western Canada through the Great Lakes and the Saint Lawrence Seaway to the east coast. Forestry and manufacturing play important roles in the city's economy, but with their decline in recent years they are being replaced by a "knowledge economy" based on medical research and education.

The city takes its name from the immense bay at the head of Lake Superior, known on 18th century French maps as "Baie du Tonnerre". The city is often referred to as the Lakehead or Canadian Lakehead because of its location at the end of Great Lakes navigation.