"Particle Man" is a song by alternative rock band They Might Be Giants, released and published in 1990. The song is the seventh track on the band's third album, Flood. It has become one of the band's most popular songs, despite never having been released as a single. John Linnell and John Flansburgh performed the song, backed by a metronome, for their 1990 Flood promotional video. Although it was released over a decade before the band began writing children's music, "Particle Man" is sometimes cited as a particularly youth-appropriate TMBG song, and a precursor to their first children's album, No!, which was not explicitly educational.