Herman Smith is the name of:

Herman Smith III (born January 25, 1971) is a former American professional football player who was a defensive end in the Canadian Football League (CFL), National Football League (NFL) and World League of American Football (WLAF). He played college football for Portland State University (PSU) and then professionally for the Hamilton Tiger-Cats and BC Lions of the CFL, London Monarchs of the WLAF and Tampa Bay Buccaneers of the NFL.

Herman Lyle Smith was an American mathematician, the co-discoverer, with E. H. Moore, of nets, and also discovered the related notion of filters independently of Henri Cartan.