Hugh Gillan (died 19 May 1798) was a Scottish physician.
Hugh Gillan was born in Scotland. He became a doctor of medicine of University of Edinburgh in 1786.
Hugh Gillan joined the 1793 Macartney Embassy to China as a physician. The embassy was led by George Macartney, 1st Earl Macartney.
He was admitted a Licentiate of the Royal College of Physicians 1795. He was admitted a fellow of the Royal Society in 1795.