2008 (MMVIII) is a leap year of the Gregorian calendar that started on a Tuesday. 32 total SpongeBob episodes premiered. Many fans said this was the worst year of SpongeBob.

• March 3 - "Krabby Road" premiered.
• March 4 - "Not Normal" premiered.
• March 5 - "Gone" premiered.
• March 6 - "Suction Cup Symphony" premiered.
• March 7 - "Penny Foolish" premiered.
• March 29 - "Nautical Novice" and "Spongicus" premiered.
• April 11 - "Pest of the West" premiered.
• June 2 - "The Splinter" premiered.
• June 3 - "Giant Squidward"
• June 5 - "Sun Bleached" premiered.
• June 6 - "House Fancy" premiered.
• August 4 - "No Nose Knows" premiered.
• August 5 - "Patty Caper" premiered.
• August 6 - "Plankton's Regular" premiered.
• August 7 - "Boating Buddies" premiered.
• August 8 - "The Krabby Kronicle" premiered. and Christmas Who? premiered in Australia.
• October 13 - "What Ever Happened to Spongebob?" premiered.
• October 14 - "Goo Goo Gas" direct-to-DVD premiered episode.
• November 28 - "The Slumber Party" premiered.
• November 28 - "Grooming Gary" premiered.
• November 28 - "Porous Pockets" premiered.
• November 28 - Krusty Krushers premiered.
• November 28 - The Card premiered.
• November 28 - Dear Vikings premiered.
• November 28 - Ditchin' premiered.