Big Torch Key

{{Short description|Island in the lower Florida Keys, United States}}

{{Use mdy dates|date=July 2023}}

{{Infobox islands

| name =Big Torch Key

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| image_name = Aerial photographs of Florida MM00034264x (6990694784).jpg| image_size =

| image_caption = Aerial view of Big Torch Key, October 1987

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| pushpin_map = Florida#Caribbean

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| pushpin_map_caption = Big Torch Key

| coordinates = {{Coord|24.71826|N|81.438346|W|display=it}}

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| location = Gulf of Mexico

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| country = {{USA}}

| country_admin_divisions_title = State

| country_admin_divisions = Florida

| country_admin_divisions_title_1 = County

| country_admin_divisions_1 = Monroe

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Big Torch Key is an island in the lower Florida Keys.{{GNIS|293932}}{{cite book | title=Embassy Cruising Guide Florida, 6th edition: Waterways of Florida's East Coast, Keys, Okeechobee, and West Coast to Mobile Bay, Alabama | publisher=Ebooks2go, Incorporated | year=2015 | isbn=978-0-7436-1141-1 | url=https://books.google.com/books?id=M70lCwAAQBAJ&pg=PT691 | access-date=September 7, 2017 | page=691}}

It is located to the north of Middle Torch Key, connected to it via a causeway.

It is named for the Sea Torchwood (Amyris elemifera L.), a native species of tree found on the island.

It is the site of an early settlement.

Although it is the largest of the three large Torch Keys, it is the only one not traversed by U.S. 1.