Map of Thunder Bay, Canada

Thunder Bay is a city in Ontario, Canada, with a population of about 108,843. It lies at 48.3820°N, 89.2502°W. Thunder Bay is about 1,080 km (671 mi) northwest of Ottawa, the capital. The nearest city on our map is Duluth, 278 km to the southwest.

Thunder Bay at a glance

Where is Thunder Bay?

• Located in the Northern and Western hemispheres.
• Daylight ranges from about 8 h 19 min on the shortest day to 16 h 06 min on the longest day (around 21 December and 21 June).

Cities near Thunder Bay

• Duluth — 278 km southwest, United States
• Wausau — 382 km south, United States
• Eau Claire — 433 km southwest, United States
• Green Bay — 440 km south, United States
• Appleton — 463 km south, United States
• Blaine — 469 km southwest, United States
• West Coon Rapids — 475 km southwest, United States
• Coon Rapids — 475 km southwest, United States
• Maplewood — 476 km southwest, United States
• Woodbury — 477 km southwest, United States

Largest cities in Ontario

• Toronto — 2,794,356
• Ottawa — 1,017,449
• Mississauga — 717,961
• Brampton — 656,480
• Hamilton — 569,353
• London — 422,324
• Etobicoke — 365,000
• Markham — 338,503
• Vaughan — 323,103
• Kitchener — 256,885

Largest cities in Canada

• Toronto — 2,794,356
• Montréal — 1,762,949
• Calgary — 1,306,784
• Ottawa — 1,017,449
• Edmonton — 1,010,899
• Winnipeg — 749,607
• Mississauga — 717,961
• Vancouver — 662,248
• Brampton — 656,480
• Hamilton — 569,353

Map of Canada and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.