"Pencil Thin Mustache" is a song written and performed by American popular-music singer and songwriter Jimmy Buffett.

[3] The song, written in a Western swing style,[4] is a nostalgic look by Buffett at the popular culture of his childhood.

Buffett refers to a number of other persons, characters, and products of the period, including Ricky Ricardo, Andy Devine, Sky (King)'s niece Penny, American Bandstand, Disneyland, Ramar of the Jungle, Bwana, Errol Flynn, the Sheik of Araby, and Brylcreem.

[2] Cash Box called it a "laid back honky tonker with incredible lyrics and a totally believable performance from Jimmy.

"[5] Record World called it a "rinky-tink razmataz of a new soft shoe filled with nostalgia references.