2011 was a common year starting on Saturday of the Gregorian calendar.

Date Event(s)
January 2 "The Algae's Always Greener" and "SpongeGuard on Duty" premiered in Poland.
January 3 SpongeBob SquarePants got picked up for a ninth season.
January 6 SpongeBob Marbles & Slides was updated for the third time.
"Sand Castles in the Sand" and "Shell Shocked" premiered in Poland.
January 9 "The Clash of Triton" premiered in Poland.
January 13 "Growth Spout," "Stuck in the Wringer," "Someone's in the Kitchen with Sandy," and "The Inside Job" premiered in Poland.
January 15 "New Fish in Town" and "Big Sister Sam" premiered.
January 16 "Just One Bite" and "The Bully" premiered in Poland.
January 28 "The Monster Who Came to Bikini Bottom," "Welcome to the Bikini Bottom Triangle," "The Main Drain," and "Sponge-Cano!" premiered.
January 29 "Trenchbillies" premiered.
February 7 Special Delivery! was reprinted.
February 9 SpongeBob Comics No. 1 was released.
February 10 "Tentacle-Vision" and "I ♥ Dancing" premiered in Poland.
February 11 "A Day Without Tears" and "Summer Job" premiered in Poland.
February 12 Tunnel of Glove and Love That Squid premiered.
SpongeBob Marbles & Slides was updated for the fourth time.
February 17 "One Coarse Meal" and "Gary in Love" premiered in Poland.
February 18 SpongeBob Marbles & Slides was updated for the fifth time.
February 24 "The Play's the Thing" and "Rodeo Daze" premiered in Poland.
February 26 "Perfect Chemistry" premiered.
March 3 "Gramma's Secret Recipe" and "The Cent of Money" premiered in Poland.
March 8 GumShoe SquarePants, SpongeLock Holmes and Dr. Patson, and What if the Mystery Ended This Way...? premiered.
The Great Patty Caper DVD was released.
March 10 "The Great Patty Caper" premiered in Poland.
March 19 "The Monster Who Came to Bikini Bottom" and "Welcome to the Bikini Bottom Triangle" premiered in Poland.
March 23 SpongeBob Marbles & Slides was updated for the sixth time.
March 26 "Oral Report" and "A Friendly Game" premiered.
March 29 The SpongeBob SquarePants Movie Blu-ray was released.
April 2 "Sentimental Sponge" premiered.
"Greasy Buffoons" and "Model Sponge" premiered in Poland.
April 12 SpongeBob SquigglePants was released on Wii.
April 13 SpongeBob Comics No. 2 was released.
April 18 The Yellow Avenger was released on PC.
May 1 The SpongeBob SquarePants series became 12 years old.
May 17 SpongeBob SquigglePants was released on 3DS.
June 4 "Squidward's School for Grown Ups" premiered.
June 8 SpongeBob Comics No. 3 was released.
June 9 SpongeBob Marbles & Slides was updated for the seventh time.
June 11 "The Curse of the Hex" premiered.
June 14 Time Machine, Lessons Learned, and And Krabs Saves the Day premiered.
Heroes of Bikini Bottom was released.
June 18 "The Hot Shot" premiered.
"That Sinking Feeling" and "Karate Star" premiered in Poland.
June 19 "Back to the Past" and "The Bad Guy Club for Villains" premiered in Poland.
June 25 "The Other Patty" premiered.
June 28 Attack of the Zombies! was released.
July 15 "Frozen Face Off" premiered.
July 18 "Accidents Will Happen" premiered.
July 19 "Drive Thru" premiered.
July 20 "Sweet and Sour Squid" premiered.
July 21 "The Googly Artiste" premiered.
July 22 "Keep Bikini Bottom Beautiful" and "A Pal for Gary" premiered in Poland.
July 24 "Frozen Face-Off" premiered in Canada.
July 25 "Yours, Mine and Mine" and "Kracked Krabs" premiered in Poland.
July 26 "The Curse of Bikini Bottom" and "Squidward in Clarinetland" premiered in Poland.
August 10 SpongeBob Comics No. 4 was released.
August 17 Jimmy Neutron's Nicktoon Blast was shut down.
September 13 Nicktoons MLB was released.
September 16 "Barnacle Face" and "Pet Sitter Pat" premiered.
September 20 SpongeBob's Runaway Roadtrip DVD was released.
September 23 "Mermaid Man Begins" and "Plankton's Good Eye" premiered.
September 30 "House Sittin' for Sandy" and "Smoothe Jazz at Bikini Bottom" premiered.
October 5 SpongeBob Marbles & Slides was updated for the eighth time.
October 12 SpongeBob Comics No. 5 was released.
October 13 SpongeBob Marbles & Slides was updated for the ninth time.
October 17 "A Friendly Game" and "Sentimental Sponge" premiered in Canada.
October 21 "Ghoul Fools" premiered.
November 7 "Walking the Plankton" premiered.
SpongeBob's Legendary Adventures was released.
November 8 "Patrick's Staycation" premiered.
November 9 "Mr. Krabs Takes a Vacation" premiered.
November 10 "Mooncation" premiered.
November 11 "A SquarePants Family Vacation" premiered.
November 12 "Sandy's Vacation in Ruins" premiered.
November 15 Holidays with SpongeBob 3-DVD Gift Set was released.
November 19 "Buried in Time," "Enchanted Tiki Dreams," "The Abrasive Side," "Earworm," "The Masterpiece," and "Whelk Attack" premiered in Poland.
November 20 "Big Sister Sam" and "Perfect Chemistry" premiered in Poland.
November 25 "The Way of the Sponge," "Bubble Troubles," "The Krabby Patty That Ate Bikini Bottom," and "Bubble Buddy Returns" premiered.
"You Don't Know Sponge" and "Tunnel of Glove" premiered in Poland.
November 26 "Krusty Dogs" and "The Wreck of the Mauna Loa" premiered in Poland.
November 27 "New Fish in Town" and "Love That Squid" premiered in Poland.
December 6 Complete Seventh Season was released.
December 14 "Accidents Will Happen," "The Other Patty," "Drive Thru," and "The Hot Shot" premiered in Canada.
SpongeBob Comics No. 6 was released.
December 24 "Hide and Then What Happens?" and "Shellback Shenanigans" premiered in Poland.