"I Ain't No Quitter" is a song by Canadian country-pop singer Shania Twain.

It was released on May 2, 2005 to country radio and physically in Europe on July 12, 2005 as the third and final single from her first compilation album Greatest Hits (2004).

Like mostly all of her discography at the time, the song was written by Twain and then-husband Robert John "Mutt" Lange, who also produced the track.

Chuck Taylor of Billboard magazine appreciated the single and said it was "catchy as all get out, while winking in the face of a classic country theme.

"[1] "I Ain't No Quitter" entered the Billboard Hot Country Singles & Tracks chart in the week of May 21, 2005, at number 55.