|Area||107 ha (260 acres)|
|Length||3 km (1.9 mi)|
|Width||0.5 km (0.31 mi)|
|Population||uninhabited nature reserve|
Porphyry Island is an island in Unorganized Thunder Bay District in northwestern Ontario, Canada. It is the last island in a chain stretching south west of the Black Bay Peninsula in Lake Superior. It is located about 6 kilometres (4 mi) from Edward Island Provincial Park, 13 kilometres (8 mi) from Sleeping Giant Provincial Park, 14 kilometres (9 mi) east of Silver Islet, Ontario, and 42 kilometres (26 mi) east of the city of Thunder Bay.
Point Porphyry Lighthouse
The federal government established a lighthouse at Point Porphyry in 1873. This is located at the southwestern tip of the island.
- Ontario Crown Land Use Policy Atlas
- "Porphyry Island". Geographical Names Data Base. Natural Resources Canada. Retrieved 2011-09-07.
- "Porphyry Island". Ontario Parks. 2002-11-12. Retrieved 2011-09-07. CS1 maint: discouraged parameter (link)
- Boegh, Beth (2005). "The Point Porphyry Light, Lake Superior : the Andrew Dick Diary and Reminiscences of Bob McKay from a Century of Lighthouse Keeping". Papers and Records. Thunder Bay Historical Museum Society. XXXIII: 17–41.
- Map 13 (PDF) (Map). 1 : 1,600,000. Official road map of Ontario. Ministry of Transportation of Ontario. 2010-01-01. Retrieved 2011-09-07. CS1 maint: discouraged parameter (link)
- Restructured municipalities - Ontario map #2 (Map). Restructuring Maps of Ontario. Ontario Ministry of Municipal Affairs and Housing. 2006. Retrieved 2011-09-07. CS1 maint: discouraged parameter (link)