Sidney Holgate, CBE (9 September 1918 – 17 May 2003) was a British mathematician and academic. Holgate was schooled at Henry Mellish School and won a scholarship to Hatfield College, Durham, where he studied Mathematics and eventually became Senior Man. He was also President of the Durham Union for Michaelmas term of 1940. Being unacceptable for wartime service on medical grounds, he instead taught for a year at Nottingham High School, before returning to Durham and completing his doctorate in 1945.