"Margaritaville" is a 1977 song by American popular music singer-songwriter Jimmy Buffett from the album Changes in Latitudes, Changes in Attitudes. This song was written about a drink Buffett discovered at Lung's Cocina del Sur restaurant on Anderson Lane in Austin, Texas,[3] and the first huge surge of tourists who descended on Key West, Florida around that time. He wrote most of the song that night at a friend's house in Austin, and finished it while spending time in Key West. In the United States "Margaritaville" reached number eight on the Billboard Hot 100 chart, and went to number one on the Easy Listening chart,[4] also peaking at #13 on the Hot Country Songs chart.[5] Billboard ranked it number 14 on its 1977 Pop Singles year-end chart.[6] It remains Buffett's highest charting solo single.

Named for the cocktail margarita, with lyrics reflecting a laid-back lifestyle in a tropical climate, "Margaritaville" has come to define Buffett's music and career. The relative importance of the song to Buffett's career is referred to obliquely in a parenthetical plural in the title of a Buffett greatest hits compilation album, Songs You Know By Heart: Jimmy Buffett's Greatest Hit(s). The name has been used in the title of other Buffett compilation albums such as Meet Me In Margaritaville: The Ultimate Collection and is also the name of several commercial products licensed by Buffett (see below). Popular culture references, throughout the years and remakes attest to the song's continuing popularity. The song was mentioned in Blake Shelton's 2004 single "Some Beach".

"Margaritaville" has been inducted into the 2016 Grammy Hall of Fame for its cultural and historic significance.

The song is about a man spending an entire season at a beach resort community. The three verses describe his day-to-day activities. In the first verse, he passes his time playing guitar on his front porch and watching tourists sunbathe, all the while eating sponge cake and waiting for a pot of shrimp to boil. In the second verse, he has nothing to show for his time except a tattoo of a woman that he cannot remember. In the third and final verse, he blew out his flip-flop, stepped on a pop-top, cuts his heel, and cruises on back home to ease his pain with a fresh batch of margaritas. When the song was used during live performances, it was changed to "I broke my leg twice, I had to limp on back home".

The three choruses reveal that the narrator is drowning his sorrows over a failed romance, and his friends are telling him that his former girlfriend is at fault. The last line of each shows his shifting attitude toward the situation: first "it's nobody's fault," then "hell, it could be my fault," and finally "it's my own damn fault."