The year 1955 in television involved some significant events. Below is a list of television-related events during 1955.

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• January 10 – Minuto de Dios begins airing on television in Colombia; it will still be running more than 60 years later.
• March 5 – Elvis Presley appears on television for the first time. The program is Louisiana Hayride, televised locally in Shreveport, Louisiana.
• March 12 – The first Flemish children's TV show, Kom Toch Eens Kijken, is broadcast, hosted by Bob Davidse (Nonkel Bob) and Terry Van Ginderen (Tante Terry).^[1]
• March 15 – The play No Time for Sergeants is broadcast by the American Broadcasting Company in The United States Steel Hour series, starring Andy Griffith in his television debut.
• April 1 – The DuMont Television Network in the United States drastically decreases its programming; just eight series keep the network operating, in anticipation of its eventual shutdown sixteen months later.
• May 9 – In the United States:
  • Harpo Marx makes a memorable appearance on I Love Lucy.
  • Jim Henson's puppet show Sam and Friends first airs on WRC-TV in Washington, D.C.
• May 10 – The first episode of the long-running and popular Flemish TV sitcom Schipper naast Mathilde is broadcast.^[1]
• June 7 – The quiz show craze begins with the premiere of The 64,000 Dollar Question in the U.S. The series spawns many imitations, including Twenty-One the next year, which will later be the focus of a quiz show scandal that results in congressional hearings.
• June 24 – Channel 4 Bang Khum Phron is launched by Thai Thorathat (Thai Television, predecessor of MCOT HD), the first official television station in Thailand.^{[citation needed]}
• June 29 – Life with the Lyons, one of the first successful British sitcoms (starring British-domiciled American couple Ben Lyon and Bebe Daniels), premieres on the BBC Television Service, having previously been broadcast only on radio. It will later transfer to ITV.
• July 19 – Eesti Televisioon begins broadcasting from Tallinn in the Estonian Soviet Socialist Republic.^[2]
• August 1 – Austrian ORF Television, predecessor of ORF eins, an officially regular broadcasting service, starts in Vienna.^[3]
• September 22 – Commercial television starts in the United Kingdom with the Independent Television Authority's first ITV franchise beginning broadcasting in London – Associated-Rediffusion on weekdays, ATV during weekends, ending the previous BBC monopoly. The rest of the UK receives its regional ITV franchises during the next seven years. The first advertisement shown is for Gibbs SR toothpaste.
• September 28 – World Series baseball is broadcast in color for the first time in the U.S. WITN-TV in Washington, North Carolina, signs on the air with game 1 of the 1955 World Series as their first telecast.^[4]
• December 10 – The first Saturday morning cartoon series debuts on U.S. television, The Mighty Mouse Playhouse on CBS.
• December 24 – The Lennon Sisters make their television debut on The Lawrence Welk Show on ABC in the U.S.
• December 25 – After being broadcast by radio since 1932, the Royal Christmas Message is broadcast on British television for the first time, in sound only at 3.00pm on both television channels, live from Sandringham House. The first visual Christmas message is shown in 1957.

• Adventures of Superman (1952–1958)
• American Bandstand (1952–1989)
• Annie Oakley (1954–1957)
• Aubrey and Gus (1955–1956)
• Beau temps, mauvais temps (1955–1958)
• Bim Bam Boom (1955–1956)
• Bozo the Clown (1949–present)
• Candid Camera (1948–present)
• Cap-aux-sorciers (1955–1958)
• Cisco Kid (1950–1956)
• Climax! (1954–1958)
• Come Dancing (UK) (1949–1995)
• Country Canada (1955–2007)
• Cross-Canada Hit Parade (1955–1960)
• Death Valley Days (1952–1975)
• Disneyland (1954–1958)
• Dragnet (1951–1959)
• Face the Nation (1954–present)
• Father Knows Best (1954-1960)
• General Motors Theatre (Can) (1953–1956, 1958–1961)
• Gillette Cavalcade of Sports (1946–1960)
• Hallmark Hall of Fame (1951–present)
• Hockey Night in Canada (1952–present)
• Howdy Doody (1947–1960)
• I Love Lucy (1951–1960)
• Junior Magazine (1955–1962)
• Kraft Television Theater (1947–1958)
• Kukla, Fran and Ollie (1947–1957)
• Life is Worth Living (1952–1957)
• Love of Life (1951–1980)
• Maggie Muggins (1955–1962)
• Meet the Press (1947–present)
• Musical Chairs (1955) – game show hosted by Bill Leyden
• Our Miss Brooks (1952-1956)
• Panorama (UK) (1953–present)
• Search for Tomorrow (1951–1986)
• Sergeant Preston of the Yukon (1955-1958)
• Talent Varieties (1955) – country music variety show
• The Adventures of Ozzie and Harriet (1952–1966)
• The Brighter Day (1954–1962)
• The Colgate Comedy Hour (1950-1955)
• The Danny Thomas Show (1953-1964)
• The Ed Sullivan Show (1948–1971)
• The George Burns and Gracie Allen Show (1950–1958)
• The Goldbergs (1949–1956)
• The Good Old Days (UK) (1953–1983)
• The Grove Family (UK) (1954–1957)
• The Guiding Light (1952–present)
• The Jack Benny Program (1950–1965)
• The Jane Wyman Show, Fireside Theatre (1949-1958)
• The Jimmy Durante Show (1954–1956)
• The Milton Berle Show (1954–1967)
• The Roy Rogers Show (1951–1957)
• The Secret Storm (1954–1974)
• The Today Show (1952–present)
• The Tonight Show (1954–present)
• The Voice of Firestone (1949–1963)
• This Is Your Life (US) (1952–1961)
• Truth or Consequences (1950–1988)
• What's My Line (1950–1967)
• Your Hit Parade (1950–1959)
• Zoo Quest (UK) (1954–1964)

• Harry Belafonte – Front Row Center
• Terry Burnham – Climax!
• David Doyle – The Philco Television Playhouse
• Zsa Zsa Gabor – Climax!
• James Garner – Cheyenne
• George Gaynes – NBC Opera Theatre
• James Hong – TV Reader's Digest
• Myrna Loy – General Electric Theater
• Fred MacMurray – General Electric Theater
• Tim McCoy – Indian Agent
• Laurence Olivier – Richard III
• Don Rickles – Stage 7
• John Saxon – Medic
• Maggie Smith – Sunday Night Theatre
• Rod Taylor – Studio 57
• Rudy Vallée – Star Tonight
• Robert Vaughn – Medic
• John Wayne – Gunsmoke
• Johnny Weissmuller – Jungle Jim
• Jane Wyman – General Electric Theater