Robert Gray (May 10, 1755 – ) was an American merchant sea captain who is known for his achievements in connection with two trading voyages to the northern Pacific coast of North America, between 1790 and 1793, which pioneered the American maritime fur trade in that region. In the course of those voyages, Gray explored portions of that coast and, in 1790, completed the first American circumnavigation of the world. He was noted for coming upon and naming the Columbia River in 1792, while on his second voyage.