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Originally launched as a [[UsefulNotes/BlockProgramming programming block]] in January 1988, [[https://nickjr.com Nick Jr.]] (also known as Nick Jr. Channel) is one of Creator/{{Nickelodeon}}'s sister channels, mainly airing shows aimed at preschoolers and young children. While the Nick Jr. block has been running since the late '80s, Nick Jr. didn't become its own separate network until 2009, when it took over the channel space held by Creator/{{Noggin}}.[[note]]The Noggin brand went dormant for a few years, but Nick eventually revived it as a streaming service in 2015 before shuttering it 2024.[[/note]]

The original Nick Jr. block was part of Nickelodeon's regular daytime schedule, typically running from 7 a.m./8 a.m. to 2 p.m. CST/3 p.m. EST. In its earliest days, the block was home to many classic off-network cartoons and foreign programming/{{anime}} such as ''WesternAnimation/TheWorldOfDavidTheGnome'', ''WesternAnimation/MuppetBabies1984'', ''Anime/BelleAndSebastian'' and ''WesternAnimation/{{Rupert}}''. The block was revamped in 1994, now with mostly Nickelodeon-made programming and a new host, Face (voiced by Creator/ChrisPhillips and Creator/BabiFloyd in the US, Creator/DavidHolt in the UK). The block launched the pre-school juggernauts ''WesternAnimation/BluesClues'' and ''WesternAnimation/DoraTheExplorer'', while also airing some fondly-remembered anime such as ''Anime/{{Noozles}}'', ''The Adventure of The Little Koala'' and ''Grimm's Fairy Tale Classics''.

When Viacom merged with Creator/{{CBS}} in 2000, the existing ''CBS Kidshow'' Saturday-morning block, supplied by Creator/{{Nelvana}}, ended in favor of ''Nick Jr. on CBS'', complete with Face hosting (the only show to be held over from the old block was another Nelvana show, ''Franklin''). 2001 saw the block add programs from "normal" Nickelodeon, mostly programs to help stations meet the E/I quota, and it was renamed ''Nick on CBS'', at least until 2004 when it reverted to only Nick Jr. shows (the 2004 revamp would also see the introduction of a new mascot, Piper O'Possum (voiced by Music/AliBrustofski in the US, Creator/AlexKelly in the UK). The block on CBS ended in 2006 after the 13-year-long Viacom/CBS split.

On September 28 of the same year, coinciding with Nickelodeon's rebranding and logo change, Nick Jr. became its own 24/7 channel, replacing Creator/{{Noggin}}. However, in 2014, the Nick Jr. name was brought back to the weekday-morning block on Nickelodeon; it continues to air, under the branding of "Nick Jr. on Nickelodeon" to distinguish it from the separate channel (which uses the name "Nick Jr. Channel"). Noggin itself was eventually relaunched as a streaming service in 2015, serving as a separate brand operating concurrently with Nick Jr. The service would shutter in 2024.

The pre-school programming block on the main Nickelodeon channel itself still remains to this day, though it has switched from Nick Jr. to Nickelodeon branding at different times.

In October 2012, the Nick Jr. Channel began airing [=NickMom=], an adult-oriented programming block. This block aired in the {{watershed}} (nighttime) hours, with new original shows and some syndicated repeats. The block's timing caused some controversy, as the Nick Jr. Channel only carried an Eastern Time Zone feed at the time, meaning that the block aired earlier in the day in some areas. A separate West Coast feed was eventually launched in February 2013, much to the relief of parents west of the Rockies. The [=NickMom=] block ran for almost three years, eventually shutting down on September 28, 2015, after an airing of ''Guarding Tess''.
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!!Nick Jr. Channel programming includes[[note]][-Any of the programming listed below may: A.) Currently be airing on Nick Jr., B.) Have aired in the United States on either Nickelodeon/Nick Jr., or C.) Aired on Nick Jr. in a non-U.S. market-] [[/note]]:
[[index]]
* ''WesternAnimation/AbbyHatcher''
* ''WesternAnimation/TheAdventuresOfPaddington''
* ''Anime/AdventuresOfTheLittleKoala''
* ''[[Literature/TheLittlePrince Adventures of the Little Prince]]'' ('70s anime)
* ''Series/TheAdventuresOfTimmyTheTooth'' (aired for three two-week periods in 1995 and 1996 to promote "The Brush In The Stone", "Rainy Day Adventure" and "An Eye For A Tooth")
* ''Series/AllegrasWindow''
* ''WesternAnimation/AstroFarm'' (United Kingdom)
* ''WesternAnimation/{{Babar}}'' (United Kingdom)
* ''Animation/BabySharksBigShow'' (co-creation with Creator/{{Pinkfong}})
* ''WesternAnimation/TheBackyardigans''
* ''Series/BananasInPyjamas'' (United Kingdom)
* ''[[Literature/{{Barbapapa}} Barbapapa: One Big Happy Family!]]'' (worldwide)
* ''WesternAnimation/BeccasBunch''
* ''WesternAnimation/{{Billy}}''
* ''WesternAnimation/BobTheBuilder''
* ''WesternAnimation/BossyBear''
* ''WesternAnimation/BlazeAndTheMonsterMachines''
* ''Franchise/BluesClues''
** ''WesternAnimation/BluesClues''
*** ''WesternAnimation/BluesBigMusicalMovie''
** ''Series/BluesRoom''
** ''WesternAnimation/BluesCluesAndYou''
*** ''Film/BluesBigCityAdventure''
* ''WesternAnimation/BubbleGuppies''
* ''WesternAnimation/TheBusyWorldOfRichardScarry''
* ''WesternAnimation/ButterbeansCafe''
* ''WesternAnimation/TheChocolix''
* ''WesternAnimation/CleoAndCuquin''
* ''WesternAnimation/CornAndPeg''
* ''Anime/DekoBokoFriends''
* ''Animation/DeerSquad''
* ''Series/DinoDan''
* ''WesternAnimation/DoctorSnuggles''
* ''WesternAnimation/DoraTheExplorer''
** ''WesternAnimation/GoDiegoGo''
** ''WesternAnimation/DoraAndFriendsIntoTheCity''
** ''WesternAnimation/{{Dora}}'' (selected territories)
* ''Series/EureekasCastle''
* ''WesternAnimation/{{Humf}}''
* ''WesternAnimation/FacesMusicParty'' (United States)
* ''WesternAnimation/FifiAndTheFlowertots'' (Non-USA)
* ''Literature/{{Franklin}}''
* ''Series/TheFreshBeatBand''
** ''WesternAnimation/FreshBeatBandOfSpies''
* ''WesternAnimation/GabbysDollhouse'' (United States; shared with Creator/{{Netflix}})
* ''Series/GullahGullahIsland''
* ''Series/TheHoobs'' (United Kingdom)
* ''WesternAnimation/JuliusJr''
* ''Series/JacksBigMusicShow''
* ''[[WesternAnimation/{{Kipper}} Kipper the Dog]]''
* ''WesternAnimation/KiriAndLou''
* ''Toys/{{Lalaloopsy}}'' (aimed at girls ages 9-14)
* ''Series/LazyTown'' (moved to Creator/PBSKidsSprout)
* ''Anime/TheLittlBits''
* ''Literature/LittleBear''
* ''WesternAnimation/LittleBill''
* ''WesternAnimation/LittleCharmers''
* ''WesternAnimation/MadeByMaddie'' [[note]]This was originally going to premiere on Nickelodeon and Nick Jr. in September 2020, but it was soon pulled off due to [[OvershadowedByControversy allegations that it plagiarized]] ''WesternAnimation/HairLove''. It is unknown when or even if the show will air.[[/note]]
* ''WesternAnimation/MaggieAndTheFerociousBeast''
* ''WesternAnimation/MagicAdventuresOfMumfie'' (United Kingdom)
* ''WesternAnimation/{{Maisy}}''
* ''[[WesternAnimation/NoddysToylandAdventures Make Way For Noddy]]'' (Germany)
* ''Literature/MaxAndRuby''
* ''Anime/MapleTown''
* ''Anime/MayaTheBee'' (anime version)
* ''Literature/{{Miffy}}''
* ''WesternAnimation/MikeTheKnight''
* ''WesternAnimation/MissSpidersSunnyPatchFriends''
* ''WesternAnimation/MooseAndZee''
* ''WesternAnimation/MuppetBabies1984''
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' (Germany and Israel)
* ''Series/{{Nanalan}}''
* ''WesternAnimation/NellaThePrincessKnight''
* ''WesternAnimation/NiHaoKaiLan''
* ''Anime/{{Noozles}}''
* ''WesternAnimation/{{Olivia}}''
* ''Series/{{Oobi}}''
* ''WesternAnimation/{{Oswald}}''
* ''WesternAnimation/PAWPatrol''
** ''WesternAnimation/RubbleAndCrew''
* ''WesternAnimation/PeppaPig''
* ''WesternAnimation/PinkyDinkyDoo''
* ''Series/{{Pinwheel}}'' (aired on Nick Jr. from 1988-90, and is retroactively categorized as a Nick Jr. show)
* ''WesternAnimation/PeterRabbit''
* ''WesternAnimation/{{Pocoyo}}''[[note]]Was aired until 2014, and then moved to Creator/CartoonNetwork's Cartoonito block in 2021.[[/note]]
* ''WesternAnimation/PuffinRock'' (United Kingdom)
* ''WesternAnimation/RainbowRangers''
* ''WesternAnimation/RickyZoom''
* ''WesternAnimation/RiseOfTheTeenageMutantNinjaTurtles''
* ''WesternAnimation/{{Rubbadubbers}}''
* ''WesternAnimation/{{Rugrats}}''
* ''WesternAnimation/{{Rupert}}''
* ''WesternAnimation/RustyRivets''
* ''Series/RyansMysteryPlaydate'' (based on WebVideo/RyanToysReview)
* ''WesternAnimation/SantiagoOfTheSeas''
* ''Series/SharonLoisAndBramsElephantShow''
* ''WesternAnimation/ShimmerAndShine''
* ''Series/ShiningTimeStation'' (aired only in 2000 to promote ''WesternAnimation/ThomasAndTheMagicRailroad'')
* ''[[Theatre/TheSpongeBobMusical The [=SpongeBob=] Musical: Live On Stage!]]'' (aired as a simulcast on the premiere and one additional time as a rerun)
* ''WesternAnimation/SunnyDay''
* ''WesternAnimation/TeamUmizoomi''
* ''Series/{{Teletubbies}}''
* ''WesternAnimation/ThomasAndFriends'' (United Kingdom, began airing in the United States after Creator/PBSKids lost the rights for a brief period of time before channel hopping to Netflix)
* ''WesternAnimation/TheTinyChefShow''
* ''WesternAnimation/TootAndPuddle''
* ''WesternAnimation/TopWing''
* ''WesternAnimation/TrulliTales'' (United States)
* ''Series/{{Tweenies}}'' (United States)
* ''WesternAnimation/WallyKazam''
* ''Series/WimziesHouse'' (United Kingdom)
* ''WesternAnimation/WinxClub''
* ''WesternAnimation/WonderPets''
* ''WesternAnimation/TheWorldOfDavidTheGnome''
* ''WesternAnimation/WowWowWubbzy''
* ''Series/TheWubbulousWorldOfDrSeuss''
* ''Series/YoGabbaGabba''[[note]]Aired on the network until 2015. Apple TV+ currently owns the rights to distribute the series and new content.[[/note]]
* ''WesternAnimation/ZackAndQuack''
[[/index]]
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