Wallace Island Marine Provincial Park, Marine provincial park in Trincomali Channel, British Columbia, Canada.

Wallace Island Marine Provincial Park covers almost all 72 hectares of Wallace Island, a long, thin island in Trincomali Channel, about 2 km northeast of Salt Spring Island and southwest of Galiano Island. The park has 18 camping sites and hiking trails across the island; the land north of Princess Cove toward Chivers is private.

The island was named for Captain Wallace Houston of HMS Trincomalee, who served in the area in 1853. Between 1947 and the mid-1960s it operated as a vacation resort; one guest cabin remains intact and the ruins of others are still visible. David Conover, who ran the resort, wrote about this period in Once Upon an Island and two later books.

David Conover ran the island's vacation resort from 1947 to the mid-1960s and wrote Once Upon an Island about that period, followed by One Man's Island and Sitting on a Salt Spring. One guest cabin still stands intact, and the remains of several others can be seen.

The park has no public ferry service; visitors arrive by private boat. Conover Cove has a small dock for shallow-draft vessels, while Princess Cove is an anchorage without one. Both coves are ringed by reefs and shoals, and the rocky reefs off Panther Point at the south end extend well past the island, so approach with caution. Once ashore, 18 camping sites and hiking trails cross the park.

Panther Point's reefs are named after the Panther, a coal carrier that ran aground there in 1874 with a full load from Nanaimo. Divers still visit the wreck's remains. The same local custom named other hazards after the ships that found them.