Parker Island is an undeveloped island in the West Isles Parish of Charlotte County, New Brunswick, Canada, where the Bay of Fundy enters Passamaquoddy Bay.
In 1832, Thomas Baillie wrote of an island south of Macs Island "which has been settled, but now is deserted. It contains about fifty acres, and is fit for a fisherman.", which could reference Parker or Jameson Island.
Jameson, Crow, Hardwood, Parker and Partridge Island are all share a land shelf north of Deer Island, where the waters are generally less than 10m below mean sea level in depth.
In December 1985, a study by Parks Canada assessed the island's value as $26,100.
In the summer of 1986, benthic algae sublittoral research stations were set up across the region including on Parker Island.
As of 2000, sea cucumber harvesting happened between Parker Island and Macs Island.