Year 2006 (MMVI) was a common year of the Gregorian calendar that started on a Sunday. 16 New SpongeBobs aired in this year. It had a middle ages-themed special called Lost in Tiem on February 20, 2006. It was released on DVD the following day, February 21. NEw SpongeBobs also aired on KCA 2006 on April 1, along with Friday episodes from June 2 until November 17. This is the first time there was new episodes on Nicksgiving Weekend. "That's No Lady" aired November 25, 2006. A special called Jingle SquarePresent aired December 22, 2006.
- February 16 - "Dunces and Dragons" premiered in Austrailia.
- February 20 - "Dunces and Dragons" premiered in the United States.
- April 1 - "Krusty Towers" and "Mrs. Puff, You're Fired" premiered.
- April 22 - The SpongeBob SquarePants Movie is released in theatres in Japan.
- May 5 - Ghost Host and Chimps Ahoy premiered.
- May 12 - Whale of a Birthday and Karate Island premiered.
- June 2 - All That Glitters and Wishing You Well premiered.
- July 1 - House of Squids and DJ Patrick premiered.
- September 22 - New Leaf premiered.
- September 29 - Once Bitten premiered.
- October 6 - Squidtastic Voyage premiered.
- October 13 - Bummer Vacation premiered.
- November 10
- The conclusion to the Best Day Ever marathon names "Karate Island" as the best episode to date.
- Best Day Ever premiered.
- TV premiere of The SpongeBob SquarePants Movie on Nickelodeon.
- November 17 - Wigstruck premiered.
- November 25 - That's No Lady premiered.
- December 22 - JingleBob SqaurePresent premiered.