The sixth season of SpongeBob SquarePants premiered on March 3, 2008, with the episode "Krabby Road" and ended with the episode "The Clash of Triton" on July 5, 2010. The first 5 episodes aired as part of the Gimme 5! Week. The next 5 new episodes have aired in the first week of June 2008 which is mainly titled SpongeBob Premiere Factor 5 (or SPF 5). Another premiere week aired August 4-8, called Bikini Bottom Confidential. Seven new premieres of Season six aired during Super Stuffed Nicktoons Weekend. Two episodes aired on February 16, part of Presidents' Day, and three new episodes have air afterward as part of "Triple Play". Another set of episodes will air between March 16 - 20, as part of "The Bob Squad". A eighth special, SpongeBob vs. The Big One aired on April 17, 2009 with guest star, Johnny Depp as Jack Kahuna Laguna. There also was the Deep Sea Danger Zone which had two episodes from this season, but had episodes from season 7 as well. A 100-episode marathon was scheduled for July 17th through the 19th, including the episodes, "To SquarePants or Not to SquarePants," "Overbooked," and "No Hat for Pat."
| Title card | # | Title | U.S. airdate | U.S. viewers (millions)
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|---|---|---|---|---|
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101a | "House Fancy" (tr • ga) | June 6, 2008 | |
| Squidward prepares his house for a TV show | ||||
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101b | "Krabby Road" (tr • ga) | March 3, 2008 | |
| Plankton creates a band to steal the Krabby Patty secret recipe | ||||
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102a | "Penny Foolish" (tr • ga) | March 7, 2008 | |
| Mr. Krabs becomes obsessed over a penny SpongeBob found | ||||
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102b | "Nautical Novice" (tr • ga) | March 29, 2008 | |
| SpongeBob tries to impress Mrs. Puff by memorizing the history of boating | ||||
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103a | "Spongicus" (tr • ga) | March 29, 2008 | |
| Plankton builds a coliseum and holds a gladiator show | ||||
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103b | "Suction Cup Symphony" (tr • ga) | March 6, 2008 | |
| Squidward writes a symphony | ||||
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104a | "Not Normal" (tr • ga) | March 4, 2008 | |
| SpongeBob becomes "normal" | ||||
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104b | "Gone" (tr • ga) | March 5, 2008 | |
| SpongeBob wakes up to find Bikini Bottom deserted | ||||
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105a | "The Splinter" (tr • ga) | June 2, 2008 | |
| SpongeBob gets a splinter at work | ||||
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105b | "Slide Whistle Stooges" (tr • ga) | February 16, 2009 | |
| SpongeBob, Patrick and Squidward play with slide whistles | ||||
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106a | "A Life in a Day" (tr • ga) | June 4, 2008 | |
| Larry's daredevil antics inspire Patrick to live a dangerous life | ||||
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106b | "Sun Bleached" (tr • ga) | June 5, 2008 | |
| SpongeBob accidentally gets too much tan | ||||
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107a | "Giant Squidward" (tr • ga) | June 3, 2008 | |
| Squidward becomes a giant when he is sprayed with fertilizer | ||||
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107b | "No Nose Knows" (tr • ga) | August 4, 2008 | |
| Patrick wants a nose | ||||
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108a | "Patty Caper" (tr • ga) | August 5, 2008 | |
| SpongeBob investigates the disappearance of the Krabby Patty secret ingredient | ||||
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108b | "Plankton's Regular" (tr • ga) | August 6, 2008 | |
| Plankton learns that he has a regular customer who visits the Chum Bucket daily | ||||
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109a | "Boating Buddies" (tr • ga) | August 7, 2008 | |
| Squidward must attend Boating School after getting a ticket | ||||
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109b | "The Krabby Kronicle" (tr • ga) | August 8, 2008 | |
| Mr. Krabs establishes a newspaper | ||||
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110a | "The Slumber Party" (tr • ga) | November 28, 2008 | |
| Mr. Krabs interferes with Pearl's slumber party | ||||
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110b | "Grooming Gary" (tr • ga) | November 28, 2008 | |
| SpongeBob enters Gary into a pet show | ||||
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111 | "SpongeBob SquarePants vs. The Big One" (tr • ga) | April 17, 2009 | |
| SpongeBob, Patrick, Squidward, Sandy and Mr. Krabs must ride a big wave to get back home | ||||
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112a | "Porous Pockets" (tr • ga) | November 28, 2008 | |
| SpongeBob becomes popular after obtaining a large amount of wealth | ||||
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112b | "Choir Boys" (tr • ga) | March 20, 2009 | |
| SpongeBob wants to join the chior that Squidward participates in | ||||
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113a | "Krusty Krushers" (tr • ga) | November 28, 2008 | |
| Mr. Krabs wants to manage SpongeBob and Patrick as a tag team wrestling duo to win $1,000,000 | ||||
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113b | "The Card" (tr • ga) | November 28, 2008 | |
| When Patrick finds a rare trading card SpongeBob tries to protect it | ||||
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114a | "Dear Vikings" (tr • ga) | November 28, 2008 | |
| SpongeBob wants to learn about the vikings | ||||
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114b | "Ditchin'" (tr • ga) | November 28, 2008 | |
| SpongeBob ditches Boating School, then gets distracted on his way back | ||||
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115a | "Grandpappy the Pirate" (tr • ga) | February 18, 2009 | |
| Mr. Krabs seeks the help of SpongeBob, Squidward and Patrick to convince his grandfather that he is a pirate | ||||
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115b | "Cephalopod Lodge" (tr • ga) | February 17, 2009 | |
| When Squidward is banished from the Cephalopod Lodge, SpongeBob and Patrick try to help him get back in | ||||
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116a | "Squid's Visit" (tr • ga) | June 4, 2009 | |
| SpongeBob tries to get Squidward to visit him at home | ||||
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116b | "To SquarePants or Not to SquarePants" (tr • ga) | July 17, 2009 | |
| When SpongeBob's square pants shrink in the washer, he must find new pants | ||||
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117a | "Shuffleboarding" (tr • ga) | February 16, 2009 | |
| SpongeBob and Patrick pretend to be their heroes at a shuffleboarding contest, but get sidetracked on the way home | ||||
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117b | "Professor Squidward" (tr • ga) | February 19, 2009 | |
| Squidward poses as Squilliam to teach a music class | ||||
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118a | "Pet or Pests" (tr • ga) | March 18, 2009 | |
| SpongeBob adopts a stray worm who gives birth to worm babies overnight | ||||
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118b | "Komputer Overload" (tr • ga) | March 19, 2009 | |
| Plankton tries to replace Karen with new computer inventions | ||||
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119a | "Gullible Pants" (tr • ga) | June 5, 2009 | |
| SpongeBob is left in charge of the Krusty Krab for a few minutes | ||||
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119b | "Overbooked" (tr • ga) | July 19, 2009 | |
| SpongeBob must be at Patrick's birthday party, help Sandy with her presentation, and help Mr. Krabs build a telescope, all at the same time | ||||
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120a | "No Hat for Pat" (tr • ga) | July 19, 2009 | |
| Patrick wants to wear the Krusty Krab hat | ||||
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120b | "Toy Store of Doom" (tr • ga) | March 17, 2009 | |
| SpongeBob and Patrick are locked in a toy store after closing | ||||
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121a | "Sand Castles in the Sand" (tr • ga) | March 16, 2009 | |
| SpongeBob and Patrick use their sand creations to battle each other | ||||
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121b | "Shell Shocked" (tr • ga) | June 1, 2009 | |
| SpongeBob searches for alternatives when Gary needs a new shell | ||||
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122a | "Chum Bucket Supreme" (tr • ga) | July 19, 2009 | |
| Plankton hires Patrick as advertising director at the Chum Bucket | ||||
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122b | "Single Cell Anniversary" (tr • ga) | June 3, 2009 | |
| SpongeBob helps Plankton find an anniversary gift for Karen | ||||
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123-124 | "Truth or Square" (tr • ga) | November 6, 2009 | |
| During a Krusty Krab anniversary celebration, SpongeBob, Patrick, Squidward and Mr. Krabs accidentally get locked in the freezer | ||||
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125a | "Pineapple Fever" (tr • ga) | June 2, 2009 | |
| Squidward is stuck indoors with SpongeBob and Patrick during a storm | ||||
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125b | "Chum Caverns" (tr • ga) | July 18, 2009 | |
| Plankton falls into an underground cave and uses its scenery to attract customers | ||||
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126 | "The Clash of Triton" (tr • ga) | July 5, 2010 | |
| King Neptune will not celebrate his birthday until SpongeBob and Patrick find his son, Triton | ||||