Andrew Belcher Gray (July 6, 1820 – April 16, 1862) was an American surveyor. Born in Norfolk, Virginia, he studied engineering and surveying under Andrew Talcott, and surveyed the Mississippi Delta with him in 1839, before joining the Texas Navy as a midshipman. Remaining in the Republic of Texas, he was appointed a surveyor for the Texas-U.S. boundary commission led by Memucan Hunt. In 1844–1846, he served as U.S. government mineral surveyor, mapping the rich copper country of the Keeweenaw Peninsula in Michigan and leasing out the government's mineral lands.