Raffill was born in England. He grew up in the Midlands near Coventry, and spent a lot of time on his uncle's farm. He worked with horses and wanted to be a jockey but was too tall. When he was 18 years old, he moved to the United States.
Raffill broke into the film industry as an animal supervisor, eventually owning his own company which would rent out animals to film and TV show. He did this on such films as The Lion (1962), Lt. Robin Crusoe, U.S.N. (1966) for Disney, Tarzan and the Valley of Gold (1966), and Monkeys, Go Home! (1967), again for Disney, as well as the TV series Tarzan (1966-68).
Raffill made his feature debut as director with The Tender Warrior (1971), starring Dan Haggerty. Raffill also helped write and produce, and handle animals. It was shot at the Okefenokee Swamp in Georgia. Raffill sold it to Warner Bros, was unhappy with what they did with it, bought it back, and re-distributed it.
The Adventures of the Wilderness Family
Raffill wrote and directed The Adventures of the Wilderness Family (1975) with Robert Logan which was a popular success, leading to two sequels, and established Raffill as a maker of family adventure films with animals.
Raffill wrote and directed High Risk (1981), shot in Mexico, which he later described as a personal favorite. The film was not widely distributed but it got him the job of writing and directing The Ice Pirates (1984), made for John Forman and David Begelman at MGM on a budget of $8 million.
Raffill directed and wrote Mac and Me (1989), made to provide royalties to the McDonald's Foundation and to have a lead with spina bifida, which became a cult favorite and won Raffill a Golden Razzie for Worst Director. 
He moved into directing for TV with The New Adventures of Robin Hood and did the TV movie The New Swiss Family Robinson (1998) with Jane Seymour and David Carradine, which he also wrote. He directed Grizzly Falls (1999) with Bryan Brown.
Raffill directed episodes of Pensacola: Wings of Gold and 18 Wheels of Justice, and the movies A Month of Sundays (2001), Survival Island (2005), Croc (2007), Bad Girl Island (2010) and Standing Ovation (2010).
In 2018, Raffill's debut novel, Rage, was published.
|1971||The Tender Warrior||Starring Dan Haggerty.|
|1972||Napoleon and Samantha||Starring Michael Douglas and Jodie Foster. Produced by Disney Studios.|
National Association of Theater Owners Movie of the Month
|1974||Snow Tigers (aka When the North Wind Blows)||Distributed by NBC|
|1975||The Adventures of the Wilderness Family|
|1976||Across the Great Divide||Winner - Outstanding Merit Award - So. California Motion Picture Council|
|1978||The Sea Gypsies||Winner - Film Advisory Board Award of Excellence|
|1984||The Philadelphia Experiment||Winner - Best Science Fiction Rome International Film Festival|
Fantafestival Award for Best Film
|The Ice Pirates|
|1988||Mac and Me||Golden Raspberry Award for Worst Director (Tied with Blake Edwards of Sunset)|
Nominated—Golden Raspberry Award for Worst Screenplay (with Steve Feke)
|1991||Mannequin Two: On the Move|
|1992||Passenger 57||#1 at the box office on opening weekend (boxofficemojo.com)|
|1994||Tammy and the T-Rex|
|Lost in Africa|
|1998||The New Swiss Family Robinson||Premiered on ABC's The Wonderful World of Disney|
|1999||Grizzly Falls||Award of Excellence Winner - Heartland Film Festival|
Marco Island Film Festival - Audience Winner 
Golden Reel Award Nominee
|2001||Adjustments||Dramatic Short Film|
|A Month of Sundays||Winner - Feature Film Award for Best Actor - Rod Steiger - 2001 New York International Independent Film and Video Festival
Winner - Best of the Festival - Feature Film - Stewart Raffil - 2002 Atlantic City Film Festival
|2002||While You Were Waiting||Winner - Silver Award for Dramatic Short Atlantic City Film Festival|
|2007||Croc||Telemovie - Aired on Sci Fi Channel|
|Sirens of the Caribbean||Shot on location in the Bahamas|
|2010||Standing Ovation||Official Selection - Cape May Film Festival 2011|
|2014||New York City Cowboys||Currently in development.|
|2015||Through Maria's Eyes||Currently in development.|
|1999–2000||Pensacola: Wings of Gold||Episodes: True Stories, A Wing and a Prayer, Cuba Libre, Busted|
|2000–2001||18 Wheels of Justice||Episodes: Two Eyes for an Eye, Through a Glass, Darkly, A Place Called Defiance, Hot Cars, Fast Women, Dance with the Devil|
- "Stewart Raffill". The New York Times.
- "EXCLUSIVE INTERVIEW: Stewart Raffill, director of TAMMY AND THE T-REX, MAC & ME and THE ICE PIRATES". Bristol Bad Film Club. 12 May 2018.
- Taylor, Tadhg (2015). Masters of the Shoot-’Em-Up: Conversations with Directors, Actors and Writers of Vintage Action Movies and Television Shows. McFarland. p. 38-43.
- CHIMPANZEE BITES HENRY, GETS SUED Los Angeles Times 22 July 1966: b5.
- "Interview with Stewart Raffill Part 2". Slashfilm. 15 July 2016.
- Filming Set in Oregon on Disney Movie Los Angeles Times 4 June 1971: f10.
- Roughing It for Togetherness Gross, Linda. Los Angeles Times 23 Dec 1976: f10.
- "Interview with Stewart Raffill Part 3". Slashfilm. 15 July 2016.
- Patches, Matt (3 April 2017). "How the Hell McDonald's Bizarre 'E.T.' Knockoff Got Made". Thrillist.
- DRESSED FOR SUCCESS: AMONG THE ESPRESSO MAKERS AND PATIO FURNITURE OF WANAMAKERS IN CENTER CITY, A MANNEQUIN HAS COME TO LIFE AGAIN. WHAT'S SHE DOING? WHY, MAKING A MOVIE, OF COURSE. Rea, Steven. Philadelphia Inquirer16 June 1990: D.1.