Theresa is a Unincorporated area located in Thunder Bay, Ontario.

• Latitude: 49° 41' 55'' North   (decimal: 49.6986111)
• Longitude: 86° 31' 12'' West   (decimal: -86.5199999)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Dispersed Rural Community
• Canadian Province/Territory: Ontario
• Location: Thunder Bay
• Atlas of Canada Locator Map: Theresa
• GPS Coordinate Locator Map: Theresa Lat/Long