This is a list of character actors whose last name ending in the letter S has appeared on The Rifleman — One Time Only. Whether they have appeared one time only or 168 times, they are just as important as the main characters and/or anyone else involved in The Rifleman. This is just a small tribute to those great many characters actors.
This section of character actors is dedicated to each & everyone one of the character actors that appeared on The Rifleman.
 They're among the most popular and recognizable actors. They may not be A-list stars, but they do something many actors don't. They worked all the time.

S
Tom Snyder ― Olan Soule
Arthur Space ― Harry Dean Stanton
Michael Stefani ― Brick Sullivan
Frank Sully
Walter Sande ― Stefan Schnabel
Sydna Scott ― Sarah Selby
Marian Seldes ― Dan Sheridan
Fred Sherman ― Pam Smith
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 Tom Snyder III as Pete, a member of the posse in A Friend in Need.

National 1970s late night talk show host Tom Snyder stated to boost ratings that were beginning to lag,
The Rifleman had local personalities to have a very small parts in the show.

Tom Snyder, a familiar face on late night television, was Tom Snyder was born in Milwaukee and got his broadcast start in a radio newsroom after graduating from Marquette University. He became a national figure in 1973 when he was named anchor of Tomorrow, a late-night television talk show that was replaced by Late Night with David Letterman in the early 1980s. After Letterman jumped to CBS, however, he hired Snyder to host The Late Late Show, which is broadcast immediately after Letterman's program. Thanks Paul in Maryland!
 

Vladimir Sokoloff as the Grandfather in The Vaqueros.

Some of his film credits are: The Real Glory (1939) ― For Whom the Bell Tolls (1943) ― Back to Bataan (1945) ― The Magnificent Seven (1960) and Taras Bulba (1962).

His television credits included Playhouse 90 (1957 -1959) ― Thriller (1961 -1962) ― Maverick (1961) ― Hennessey (1961) ― Lawman  (1960) ― Zane Grey Theatre (1960) ―  Wagon Train (1961) ― Have Gun - Will Travel (1957) ― The Untouchables (1960 -1961) ― Twilight Zone (1961 -1962) and many more.

A veteran of the Moscow Art Theatre, Sokoloff acted in Berlin and Paris, both on stage and in films. He also studied philosophy and literature in Moscow. He trained in acting with Stanislavski, at Moscow's Art Theatre.

Sokoloff left Russia in 1923, and made his home in Germany, where he made his first film, Uneasy Money. He arrived in Hollywood in 1937 and played several character roles, often playing foreign types, it is said that he portrayed over thirty different nationalities during his career.

Sokoloff was active in films and television up to the time of his death.

Born: December 26, 1889 in Moscow, Russian Empire [now Russia]
Died: February 15, 1962 (age 72) in West Hollywood, Los Angeles, California
 

Olan Soule as the Hardware Clerk in The Anvil Chorus.

He also appeared with Chuck in Arrest and Trial (1964).

Olan Soule appeared in hundreds of films, radio and television shows. He began his career in 1926, on radio performing for 11 years in the daytime soap opera Bachelor's Children and later on the evening radio show First Nighter in the 1940s. Also during this time, he was a leading radio actor on many other shows plus voiceovers for commercials and cartoons. His biggest success came with the advent of television where he was a regular on many programs such as Dragnet (1952 - 1959) ― The Untouchables (1960 -1963) ― Petticoat Junction (1963 -1969) ― My Three Sons (1963 -1970) ― The Jack Benny Program (1958 -1961) ― Alfred Hitchcock Presents (1955 - 1962) Alfred Hitchcock Hour (1962 -1963) ― Bonanza (1961 -1967). For feature films, he appeared in Cuban Fireball (1951) ― Francis Joins the WACS (1954) ― North by Northwest (1959) ― The Seven Minutes (1971) ― St. Ives (1976), among others.

Soule was a leading radio actor, and portrayed many TV program and commercial voiceovers and cartoon voices, including Batman in all but the Galactic Guardians version of The Super Friends.
He starred on The First Nighter Program on Mutual (1943-1944) and CBS Radio (1945-1949).
He was the first actor to provide the voice of Batman in an animated feature.

Born: February 28, 1909 in La Harpe, Illinois, USA
Died: February 1, 1994 (age 84) in Los Angeles, California, USA