George Bryan Cooper (June 6, 1808 – August 29, 1866) was a politician from the U.S. state of Michigan. Cooper was born in Long Hill Township, New Jersey, where he attended the public schools. He moved to Ann Arbor, Michigan in 1830, and later to Jackson in 1835. In Jackson he engaged in mercantile pursuits and became postmaster of Jackson from 1836 to 1846. He was a member of the Michigan State Senate 4th District, 1837–1838. He established an iron foundry at Jackson in 1840 and served in the Michigan State House of Representatives in 1842. He served as State Treasurer of Michigan from March 17, 1846 to March 13, 1850. He engaged in banking at Jackson in 1851.