"What's on My Mind" is a song written by Kerry Livgren that was first released by Kansas on their 1976 album Leftoverture.

[3] Cash Box said of the single "What's on My Mind" that it has a "combination of accessible pop melodies and brittle-edged instrumentation" and that "there are hooks here in the guitar work as well as the harmony vocals.

"[5] News-Pilot critic Joseph Bensoua called out "What's on My Mind" and "Carry On Wayward Son" as "examples of how progressive musical themes can be merged with the basic energy of afforded with punchy rock.

"[8] In 1998, St. Louis News Tribune critic Andy Charest described "What's on My Mind" as one of Kansas' hits.

[10] Music journalist Gary Graff affirmed Bensoua's view that the song is "punchy rock".