The Best Seasons of 'It's Always Sunny in Philadelphia'

Voting Rules
Rank the seasons of It's Always Sunny in Philadelphia based on quality.

This list of the best seasons of It's Always Sunny in Philadelphia is listed from best to worst with DVD cover pictures when available. IASIP fans will also enjoy Mac's most bicurious moments and insane fan theories about the show. Hardcore fans of the show often argue over what the greatest season of It's Always Sunny in Philadelphia is, which is exactly why this ranked list was created. The best Always Sunny episodes and the top 10 Always Sunny episodes are all a part of the best seasons of Its Always Sunny in Philadelphia. 

It's Always Sunny in Philadelphia is arguably one of the most hilarious situational comedies on television today. The show follows the lives of "The Gang," a group of self-centered, arguably sociopathic friends who run an Irish pub in South Philly. Starring Danny DeVito, Charlie Day, Rob McElhenney, Kaitlin Olson, and Glenn Howard, it's nearly impossible to pick which season of It's Always Sunny is truly the best.  

Every season of It's Always Sunny in Philadelphia has at least one memorable episode, so it isn't necessarily easy to figure out what the top season is. If you want to answer the questions, "What is the best season of It's Always Sunny in Philadelphia?" and "Which season of It's Always Sunny in Philadelphia is the best?" then this list will have you covered. Vote up the best seasons of It's Always Sunny in Philadelphia below.

Photo: It's Always Sunny In Philadelphia / FXX

  • It's Always Sunny in Philadelphia - Season 4
    Photo: FXX

    The fourth season of It's Always Sunny in Philadelphia premiered on September 18, 2008 and contains 13 episodes. This season finds the gang scheming and hatching plans to gain money and power.

    This season features several unforgettable episodes including: "Dennis Reynolds: An Erotic Life," "Paddy's Pub: The Worst Bar in Philadelphia," and "The Nightman Cometh."

    Memorable moments from Season 4 include:

    • Charlie puts on his play "The Nightman Cometh".
    • Dennis meets Sinbad and Rob Thomas in rehab.
    • Frank and Charlie find poop in their bed.
    793 votes
  • It's Always Sunny in Philadelphia - Season 5
    Photo: FXX

    The fifth season of It's Always Sunny in Philadelphia premiered on September 17, 2009 and contains 12 episodes. This season finds the gang attempting to benefit from the recession.

    This season features several unforgettable episodes including: "The Gang Gives Frank an Intervention," "The Waitress Is Getting Married," and "Mac and Charlie Write a Movie."

    Memorable moments from Season 5 include:

    • The gang drinks wine out of soda cans.
    • Frank becomes the "Trash Man".
    • The gang tries to create a Shyamalan twist.
    706 votes
  • It's Always Sunny in Philadelphia - Season 7
    Photo: FXX

    The seventh season of It's Always Sunny in Philadelphia premiered on September 15, 2011 and contains 13 episodes. This season finds Mac struggling with weight gain.

    This season features several unforgettable episodes including: "Frank Reynolds’ Little Beauties," "Chardee MacDennis: The Game of Games," and "How Mac Got Fat."

    Memorable moments from Season 7 include:

    • Kings of Leon attend the gang's high school reunion.
    • Frank hosts a beauty pageant for young girls.
    • Dee fakes a baby funeral.
    841 votes
  • It's Always Sunny in Philadelphia - Season 3
    Photo: FXX

    The third season of It's Always Sunny in Philadelphia premiered on September 13, 2007 and contains 15 episodes. This season finds the gang facing problems with the law and their enemies, the McPoyles.

    This season features several unforgettable episodes including: "Sweet Dee's Dating a Retarded Person," "Mac is a Serial Killer," and "The Gang Dances Their Asses Off."

    Memorable moments from Season 3 include:

    • Charlie and Dennis perform "Dayman".
    • Dennis and Charlie face off in a dance competition.
    • Mac is reunited with his father.
    573 votes
  • It's Always Sunny in Philadelphia - Season 12
    Photo: FXX
    5
    218 VOTES

    It's Always Sunny in Philadelphia - Season 12

    The twelfth season of It's Always Sunny in Philadelphia premiered on January 4, 2017 and contains 10 episodes. This season finds the gang examining their own crimes.

    This season features several unforgettable episodes including: "Old Lady House: A Situation Comedy," "Making Dennis Reynolds a Murderer," and "A Cricket's Tale."

    Memorable moments from Season 12 include:

    • Maureen is found dead.
    • Dennis becomes a stripper.
    • Charlie finally wins over The Waitress.
    218 votes
  • It's Always Sunny in Philadelphia -    Season 10
    Photo: FXX

    The tenth season of It's Always Sunny in Philadelphia premiered on January 14, 2015 and contains 10 episodes. 

    This season contains several unforgettable episodes including: "The Gang Group Dates," "Charlie Works," and "The Gang Goes on Family Fight."

    Memorable moments from Season 10 include:

    • The gang trying to drink 70 beers during a flight.
    • Psycho Pete returns from a mental institution.
    • Keegan-Michael Key guest stars as a game show host

     

    363 votes