Sydney Herbert Stewart Thompson (September 23, 1920 – November 26, 1997) was a merchant and served as a Social Credit Party of Canada Member of Parliament from 1957 to 1958. Thompson first ran for a seat in the House of Commons of Canada for the 1957 Canadian federal election. He defeated incumbent Richmond Francis Hanna to win the Edmonton—Strathcona electoral district. Thompson was defeated a year later by Terry Nugent in the 1958 federal election.