Two Lefts Don't Make a Right...but Three Do (often called Two Lefts) is the third full-length album released by Christian rock band Relient K. The album was nominated for a Grammy for Best Rock Gospel Album, but the award that year ended up being won by Worldwide by Audio Adrenaline. This album was initially released with four different covers, each one depicting a separate car wreck. In November 2003, a fifth cover was released, which showed all four cars in a junkyard. That is now the only version of the CD still in print, although a very small amount the four original covers can still be found. It was also released as a combo pack with Deck the Halls, Bruise Your Hand for a few years around Christmas time. The album peaked at No. 38 on the Billboard 200.

Two Lefts Don't Make a Right...but Three Do was certified Gold on March 21, 2005 by the RIAA for sales in excess of 500,000 in the United States. It has currently sold around 518,000 in the United States. A Gold Edition of this album was released on October 31, 2006. The idea for a Gold Edition of this album came from Gotee Records, who also released a Gold Edition of The Anatomy of the Tongue in Cheek on the same day. The Gold Edition of this album has remixed and remastered sound similar to Mmhmm (the album was remixed by the same people who mixed Mmhmm) and it is also enhanced with a music video for the song "Chap Stick, Chapped Lips, and Things Like Chemistry".