Stephen Foster Briggs (December 4, 1885 – October 16, 1976) was an American engineer, co-founder of the company manufacturing Briggs & Stratton small internal-combustion engines and founder of Outboard Marine Corporation.
S.F. Briggs was born in Watertown, South Dakota and graduated from South Dakota State College in Brookings, South Dakota (1907). The idea for his first product came from an upper-class engineering project at SDSC. This first product was a six-cylinder, two-cycle engine, which Stephen Foster Briggs developed during his engineering courses at South Dakota State College. After his graduation, he was eager to produce his engine and enter the rapidly expanding automobile industry. Bill Juneau, a coach at South Dakota State, knew of Briggs' ambition and the entrepreneurial interests of Harold M. Stratton, a successful grain merchant who had a farm next to Juneau's farm.