The following is a list of events relating totelevision in Ireland from 1990.

• 4 June –Ian Dempsey presents his final day of the afternoon children's television blockDempsey's Den. He will be taken over byRay D'Arcy and the name will be changed toThe Den.
• 24 July – The Broadcasting Act comes into law. The Act includes amendments to earlier legislation covering advertising and commercial promotion.^[1]
• 2 October – The long-running British sitcomOnly Fools and Horses is broadcast in Ireland for the first time, making its debut onNetwork 2.
• 11 October – The American-French-Canadian animated cult series from the 1980sInspector Gadget has its broadcasting onNetwork 2 as part ofThe Den for the very first time.
• 13 November –Robert D. Cardona andDavid Mitton's short lived children's television seriesTugs debuts onNetwork 2 as the first programme onThe Den. The first episode will air on a Tuesday and the other episodes will air every Monday starting from 19 November.Thomas the Tank Engine & Friends will not appear on Irish television until six years later.
• 19 November – American television sitcomSidekicks is broadcast in Ireland for the first time, making its debut onNetwork 2 as part of their children's programming strandThe Den.
• Bosco: The Animated Series airs onChannel 5 in Singapore for the very first time as part of its children's blockKids' Corner. This was also the very first time that theBosco franchise was broadcast abroad.

• 1 January –Around the World in 80 Days (1989)
• 27 July –Yellowthread Street (1990)
• 21 September –Winning Streak (1990–present)
• 22 September –Secrets (1990–1993)
• 23 September – //The New Adventures of Black Beauty (1990–1992)
• 7 October –School Around the Corner (1990–1994)
• 17 November –Round the Bend (1989–1991)
• 30 December –The Silver Chair (1990)
• Undated –Dear Sarah (1990)
• Undated –Twin Peaks (1990–1991, 2017)

• 4 January –Pals (1987)
• 9 January –Gophers! (1990)
• 22 January – /The World of David the Gnome (1985)
• 7 February – /Worzel Gummidge Down Under (1987–1989)
• 11 February –Zorro (1990–1993)
• 8 March –All Change (1989–1991)
• 9 March – /Dogtanian and the Three Muskehounds (1981–1982)
• 13 March –A Pup Named Scooby-Doo (1988–1991)
• 19 March –Rarg (1988)
• 29 March –The Second Voyage of the Mimi (1988)
• 2 April –Bright Sparks (1989)
• 17 April –Mike and Angelo (1989–2000)
• 18 April –The Adventures of Raggedy Ann and Andy (1988–1990)
• 18 April –Alvin and the Chipmunks (Murakami Wolf Swenson/DiC version) (1988–1989)
• 27 April –Mr Majeika (1988–1990)
• 10 May –Touché Turtle (1962–1963)
• 12 July –Byker Grove (1989–2006)
• 12 July –The Ozlets (1986)
• 13 July –Storybook World (1988)
• 18 July –Popeye and Son (1987)
• 21 July –The New Yogi Bear Show (1988)
• 6 August –Check It Out! (1985–1988)
• 8 August –Hills End (1988)
• 9 August –Woof! (1989–1997)
• 3 September –Wisdom of the Gnomes (1987–1988)
• 4 September –Tottie: The Story of a Doll's House (1984–1986)
• 6 September –Hokey Wolf (1960–1961)
• 6 September –Superman (1988)
• 7 September –Teenage Mutant Hero Turtles (1987–1996)
• 11 September –The Fruitties (1987–1989)
• 20 September – //The Care Bears (1985)
• 2 October –Capital News (1990)
• 2 October –Only Fools and Horses (1981–1983, 1985–1993, 1996, 2001–2003, 2014)
• 8 October –Grimm's Fairy Tales (1984–1986)
• 11 October – //Inspector Gadget (1983–1986)
• 31 October –Ferris Bueller (1990)
• 8 November –The Castle of Adventure (1990)
• 13 November –Tugs (1989)
• 19 November –Sidekicks (1986–1987)
• 5 December –Edward and Friends (1987)
• 13 December –Captain Planet and the Planeteers (1990–1996)
• 16 December –The Chiffy Kids (1976–1980)
• 24 December –Bluetoes the Christmas Elf (1988)
• 25 December –Granpa (1989)
• Undated –Saved by the Bell (1989–1993)
• Undated -A Peaceable Kingdom (1989)

• RTÉ News: Nine O'Clock (1961–present)
• RTÉ News: Six One (1962–present)
• The Late Late Show (1962–present)

• Sports Stadium (1973–1997)
• The Late Late Toy Show (1975–present)
• RTÉ News on Two (1978–2014)
• Bosco (1979–1996)
• The Sunday Game (1979–present)

• Today Tonight (1982–1992)
• Mailbag (1982–1996)
• Glenroe (1983–2001)
• Live at 3 (1986–1997)
• Saturday Live (1986–1999)
• Questions and Answers (1986–2009)
• Dempsey's Den (1986–2010)
• Marketplace (1987–1996)
• Where in the World? (1987–1996)
• Know Your Sport (1987–1998)
• Nighthawks (1988–1992)
• Jo Maxi (1988–1993)
• Kenny Live (1988–1999)
• Fair City (1989–present)
• RTÉ News: One O'Clock (1989–present)

• 6 March –Rapid Roulette (1986–1990)

• 1990 in Ireland

• 1990 in Irish television
• 1990s in Irish television

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