Previous Year: 2004 Next Year: 2006
2005 (MMV) was a common year of the Gregorian calendar that started on a Saturday. No new episodes aired until May 6, due to rumors that the show would end. After Good Neighbors, no episodes aired untilSelling Out, which aired on September 23, 2005.
Only 13 episodes aired this year.
- January 1 - The SpongeBob SquarePants Movie is released in theaters in Columbia.
- January 4 - Home Sweet Pineapple was released on DVD and VHS in the United States
- January 6 - The SpongeBob SquarePants Movie is released in theaters in Australia, New Zealand, and Argentina.
- January 7 - The SpongeBob SquarePants Movie is released in theaters in Central America.
- January 13 - The SpongeBob SquarePants Movie is released in theaters in Peru.
- January 28 - The SpongeBob SquarePants Movie is released in theaters in Spain.
- February 2 - The SpongeBob SquarePants Movie is released in theaters in Belgium.
- February 3 - The SpongeBob SquarePants Movie is released in theaters in the Netherlands.
- February 9 - The SpongeBob SquarePants Movie is released in theaters in France.
- February 11 - The SpongeBob SquarePants Movie is released in theaters in the United Kingdom and Ireland.
- March 1 - The SpongeBob SquarePants Movie is released on DVD and VHS in the United States.
- March 11 - The SpongeBob SquarePants Movie is released in theaters in Austria.
- March 13 - The SpongeBob SquarePants Movie is released in theaters in Turkey.
- March 17 - The SpongeBob SquarePants Movie is released in theaters in Russia, Singapore, and the Czech Republic.
- April 6 - The SpongeBob SquarePants Movie is released in theaters in the Philippines.
- April 8 - The SpongeBob SquarePants Movie is released in theaters in South Africa.
- April 16 - The SpongeBob SquarePants Movie is released in theaters in Indonesia.
- May 6 - Fear of a Krabby Patty and Shell of a Man premiered, beginning season 4 and the post-movie era.
- May 13 - The Lost Mattress and Krabs vs. Plankton premiered.
- May 20 - Skill Crane and Good Neighbors premiered.
- May 24 - Fear of a Krabby Patty was released on DVD and VHS in the United States.
- June 10 - The SpongeBob SquarePants Movie is released in theaters in Denmark.
- June 17 - The SpongeBob SquarePants Movie is released in theaters in Norway.
- June 26 - The SpongeBob SquarePants Movie is released in theaters in Sweden.
- September 16 - The SpongeBob SquarePants Movie is released in theaters in Greece.
- September 20 - Absorbing Favorites was released on DVD and VHS in the United States.
- September 23
- Selling Out premiered.
- The SpongeBob SquarePants Movie is released in theaters in Italy.
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- SpongeBob Goes to the Doctor was released. (This has not been added to the "September 27" page, if you can please add it)
- The Complete 3rd Season was released.
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- Funny Pants premiered.
- The SpongeBob SquarePants Movie is released in theaters in South Korea.
- October 7 - Mermaid Man and Barnacle Boy VI: The Motion Picture premiered.
- October 14 - Enemy In-Law premiered.
- October 21 - Patrick SmartPants premiered.
- October 26 - Nicktoons Unite! was released on PS2, Game Boy Advance, and Game Cube in North America.
- November 4 - SquidBob TentaclePants premiered.
- November 11 - Have You Seen This Snail? premiered.
- November 15 - Where's Gary? was released on DVD and VHS in the United States.