Lionel Mark Smith (February 5, 1946 – February 13, 2008) was an American actor.

He appeared in several movies including Galaxina,Homicide, Edmond, State and Main and Spartan. He also appeared on such television series as Seinfeld, NYPD Blue, Beverly Hills, 90210 and Hill Street Blues.

His last appearance was in the 2007 horror film Stuck. He died from cancer in 2008, aged 62.