Hearts of Oak is the third studio album by American indie rock band Ted Leo and the Pharmacists, released on February 11, 2003 by Lookout!

Hearts of Oak garnered universal acclaim from music critics highlighting Leo's musicianship in terms of lyrical content, instrumentation and vocal performance.

[2] Tim Sendra of AllMusic found the album a great follow-up to The Tyranny of Distance, praising the controlled stew of different rock genres used throughout and Leo for having an ear for tight musicianship and vocal range, concluding that "Hearts of Oak is a powerful and emotional record that you simply must own.

"[6] Matt Gonzales of PopMatters said that despite some lyrical content feeling too idiosyncratic and obscure with its references, he praised Leo for going head-first against himself and worldwide topical problems with his musically symmetrical band, saying that "Hearts of Oak is an informal message that couldn’t have come at a more fitting time.

Pitchfork writer Joshua Love said that "Hearts of Oak is Ted's finest hour, packed to the gills not only with fierce, hyper-intelligent agitprop ("The Ballad of the Sin Eater" shaming Ugly Americans for all eternity), but also combustibly catchy pop-punk hooks.