List of milestones

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This is a list of milestones achieved by the animated television series SpongeBob SquarePants.

List

May 1, 1999 - The series aired for the first time.
October 26, 2000 - The series' second season started with "Something Smells" and "Bossy Boots."
March 3, 2001 - The series' first season ended with "Mermaid Man and Barnacle Boy II."
October 5, 2001 - The series' third season started with "The Bully" and "Just One Bite."
May 10, 2002 - The series has reached 100 episode segments, that being "Krusty Krab Training Video."
July 26, 2003 - The series' second season ended with "Gary Takes a Bath."
October 11, 2004 - The series' third season ended with "SpongeBob Meets the Strangler" and "Pranks a Lot."
November 19, 2004 - The series' first movie was released.
May 6, 2005 - The series' fourth season started with "Fear of a Krabby Patty" and "Shell of a Man."
February 19, 2007 - The series' fifth season started with "Rise and Shine," "Waiting," and "Sing a Song of Patrick."
July 24, 2007 - The series' fourth season ended with "Squid Wood."
March 3, 2008 - The series' sixth season started with "Krabby Road."
March 29, 2008 - The series has reached 200 episode segments, that being "Nautical Novice."
May 1, 2009 - The series has reached its 10-year anniversary.
July 19, 2009 -
- The series' fifth season ended with "Goo Goo Gas."
- The series' seventh season started with "Tentacle-Vision," "I ♥ Dancing," "Growth Spout", "Stuck in the Wringer," "Someone's in the Kitchen with Sandy," and "The Inside Job."
- The series marked the airing of the first 100 episodes (although episodes after the 100th has aired).
July 5, 2010 - The series' sixth season ended with "The Clash of Triton."
March 26, 2011 - The series' eighth season started with "A Friendly Game" and "Oral Report."
June 11, 2011 - The series' seventh season ended with "The Curse of the Hex."
July 15, 2011 - The series has reached 300 episode segments, that being "Frozen Face-Off."
April 11, 2012 - The series became the longest-running animated series on Nickelodeon.
July 21, 2012 -
- The series' ninth season started with "Extreme Spots" and "Squirrel Record."
- The series made a switch to widescreen high-definition.
December 6, 2012 - The series' eighth season ended with "It's a SpongeBob Christmas!."
May 1, 2014 - The series has reached its 15-year anniversary.
February 6, 2015 - The series' second movie was released.
October 15, 2016 - The series' tenth season started with "Whirly Brains."
February 20, 2017 -
- The series' ninth season ended with "Goodbye, Krabby Patty?."
- The series marked the airing of the first 200 episodes (although episodes after the 200th has aired).
March 18, 2017 - The series has reached 400 episode segments, that being "Life Insurance."
June 24, 2017 - The series' eleventh season started with "Spot Returns" and "The Check-Up."
December 2, 2017 - The series' tenth season ended with "The Incredible Shrinking Sponge."
November 11, 2018 - The series' twelfth season started with "FarmerBob."
November 25, 2018 - The series' eleventh season ended with "Goons on the Moon."
May 1, 2019 - The series has reached its 20-year anniversary.
November 30, 2019 - The series has reached 500 episode segments, that being "The Hankering."
October 22, 2020 - The series' thirteenth season started with "A Place for Pets" and "Lockdown for Love."
March 4, 2021 - The series' first ever spin-off, Kamp Koral: SpongeBob's Under Years, released on Paramount+.
July 9, 2021 - The series' second spin-off, The Patrick Star Show, premiered on Nickelodeon.
April 29, 2022 - The series' twelfth season ended with "Kwarantined Krab."
November 1, 2023 - The series' thirteenth season ended with "Sandy, Help Us!."
November 2, 2023 - The series' fourteenth season started with "Single-Celled Defense."
May 1, 2024 - The series has reached its 25-year anniversary.
July 16, 2024 - The series marked the airing of the first 300 episodes.
July 24, 2024 - The series' fifteenth season started with "Sammy Suckerfish."
December 2, 2024 - The series' fourteenth season ended with "Sandy's Country Christmas."
February 22, 2025 - The series became the longest-running American animated children's television series.
March 7, 2025 - The series has reached 600 episode segments, that being "Firehouse Bob."
June 20, 2025 - The series' fifteenth season ended with "Making Waves" and "Captain Quasar: The Next Iteration."
June 27, 2025 - The series' sixteenth season started with "SpongeBob and Patrick's Timeline Twist-Up."

This list is incomplete, but you can help Encyclopedia SpongeBobia by expanding it.

Longest-running animated series on Nickelodeon

SpongeBob SquarePants first aired on May 1, 1999. On April 11, 2012, when SpongeBob SquarePants aired its 173rd episode, this made SpongeBob SquarePants become the longest-running animated series on Nickelodeon before, Rugrats was the longest-running animated series on Nickelodeon, with 172 episodes.

200-episode milestone

The ninth season contained a total of 26 episodes, bringing the series' overall episode count to 204. This made SpongeBob SquarePants the first Nicktoon to pass the milestone of 200 episodes.

Longest-running American animated children's television series

On February 22, 2025, ToonHive announced that SpongeBob SquarePants officially became the longest-running animated children's television show in the United States, surpassing Arthur, which aired for 25 seasons and 253 episodes from 1996 to 2022. Arthur was the longest-running American animated children's television series and the fourth longest-running American animated television series.

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