Edward Otho Cresap Ord (October 18, 1818 – July 22, 1883) was an American engineer and United States Army officer who saw action in the Seminole War, the Indian Wars, and the American Civil War. He commanded an army during the final days of the Civil War, and was instrumental in forcing the surrender of Confederate General Robert E. Lee. He also designed Fort Sam Houston. He died in Havana, Cuba of Yellow fever.
Ord was born in Cumberland, Maryland, the son of James and Rebecca Ord. Family tradition made James Ord the illegitimate son of George IV of England and Maria Fitzherbert but he seems likely to have been the son of Ralph Ord, who was baptised at Wapping, Middlesex, in 1757, the son of John Ord, a factor (agent) from Berwick-upon-Tweed. Edward Ord was considered a mathematical genius and was appointed to the United States Military Academy by President Andrew Jackson. His roommate at West Point was future general William T. Sherman. He graduated in 1839 and was commissioned a second lieutenant in the 3rd U.S. Artillery. He fought in the Second Seminole War in Florida and was promoted to first lieutenant.